ILLUSTRATIONS A Adding Implement, Webb's.......132 Auger and Dit, Kasson's........... 40 B Baby talker, Gcisler's.............168 Baptist church, West Spruce st... 53 Barrow, dump ing, Farmer's.......260 Beams in walls, fastening.........165 Blower, pressure, Sturtevant'a__148 Boiler scirper, Morse's............337 Boiler, sectional, Howard's........ 52 Boiler, the Gerner.................. 97 Boiler-tube scraper, Pratt's........ 356 Bolt machine.......................389 Bookcase, portable, Haskell's.....292 Brick press, the Niagara...........116 C Car wheel, A yer's.................. 72 Carpet stretcher, etc., Weaver's.. 406 Care catch, Applegate's............ 101 Centrifugal machine, Western's... 104 Cheese safe and cutter Bulpin's.. 36 Clo'thesline lioldcr, MeMaster's... 52 Corn husker and sheller, Dickinson's............................. 6 j Cottages for laboring elapses.....i 84 Cotton ftnd hay prc*8. Albeitson's $3 CtUtlvntor*hf*ft(fi Txhrt'fttii.tii. Im ct*mntiv)i)]9hepafix iiii*i w M; Pyilttiwf rftrd fastens KoWim 8o ' D Design for six dwellings...........180 Desk, I/everingr's..................356 Ditching machine, Conarroe's__232 Door bolt and lock, Miller's.......344 Drain-tile machine, Tiffany's......312 Drill, self-lubricating and clearing. ............................248 Drill, small portable, Miller's..... 392 Drilling machine, ra! ial. ......... 65 Dynamometer, Emerson's......... 1 E Electric wand......................388 Emery grinder and polisher. ..... 324 Ensrine governor, Bellis'.......... 8 Engine, portable, Greene's........132 Engine, the Roper caloric.........257 F Feed-water heater, Waters'....... 101 Fence, portable,CooIidge & Rollins.............................. 152 I Furnace grate bar, Tupper's.....360 G Gas chandelier apparatus.......... 406 Gasntters' tool, Hlramer's.........280 Gato catch, Hendricks'............21B Globe valve* Douglas'.............200 II l-HMMrt ttft *ttd pad) Btairj fa 1 AtMn9D'i,liiitiiiiiiiitiuii4l m Harvester cutter grinder, Empire 184 Hay loader, Douglas'.............. 100 Headstall, safety, Barnes'......... 145 Hince and door stay, Umstadt- er's.............................. 296 Hominy mill, Duer's...............860 Horse collar, Sharp & Shannon's. 56 Horse rake, Hunsberger's......... 40 Horse rake, Reese's................ 24 Hosepipe, Babbitt's...............356 Houses, plan for four cheap.......944 I Inhaler, Tichenor's................403 Inkstand, the Stoltz rotary........ 88 Iron mills of Jones & Laighlins. 49 K. Kerosene lamp,1 Perkins House's......................... 276 Kerosene safety lamp, Sanford's.. 212 Kymasthene, Leon's............... 321 L. Letter envelope, Hackenberg's... 389 Letter opener, Gross'.............. 232 Looking-glass reflector............ 376 Lubricator, Greene's..;.*,.,...,! 133 M MtlkjMUl Matwls, Bttfgaiiftt'.... 8W O Ore concentrator, Pcarce's.......129 P Pacifi c railroad views............. S28 Plane, Smith & Carpenter's....... 5 Planer, the Schenok Wood worth. 241 Plow truck, Clee's................. 324 Press, autographic, Maurice's..... 193 Prop block, carriage, Stiekel's... 344 Pulley for short belts, bearing. -. 1S1 Pump, automatic lifting, Koch's.. 248 Pumps, steam, Cope & Maxwell's 113 Punch, lever bench, Mason's.....168 R Kail chair, etc., Van Guysling-'s... 289 Railroad for highways, Larman- lat's.............................. 388 Railroadswitch and frog,Bell's.. 164 Railway bridge over the Avon... 209 Railway rail. King's............... 164 Refrigerating machine, Messrs. Siebe's.......................... 68 S Sash lock, Hutton's................ 181 Saw filer and gummer, Thompson's............................. l'n Saw guide, jointer, ajage, No yes'. 120 Scroll saw, Knowlton'a__....... 61 Sewing machine tuck creaser. Sheafa,iton(irttmgKI(!holrB.,.. Ui . Begenr,,;,;,,,,,,,,.....n,,,, SM MwommM gsgei,, i;,,, i..;, i i m i Ships' rudders,working..........212 Shutter fastener, Brooke's........ 120 Shutter fastener, Farrar's........ 69 Shuiter opener ana fastener, Harris'..............................325 Sleigh attachment, Stonebank's. 152 Spring, carriage and car, Douglass'.........................__373 Steam boiler furnace, Paige's__248 Steam boiler heater................ 60 Steam boiler, sectional, Koot's__2T3 Steam engine, Baxter's............ 353 Steam engine, toy.............69, 197 Steam gage and tester, the Utiea. 136 Steam generator, cultiary, Davis' 200 Steam hammer, Sweet's...........289 Steam port, low water, Coch- rane's........................... 325 Stone dresser. Holmes'. .......... 133 Stove funnel cap, etc.. Little's.... 228 Stovepipe joint, Faint's.......... 72 Straw cutter, Ambrun's........... 85 Submarine drilling machine, Lewis'........................385 Suspension bridge, Cincinnati.... 216 Suspension track and car,Morse's 341 Thrasher and winnower, , 305 Schmeyer's........... "" "'808 , TimDer beasts................' ,161 fooipbst, Leach's,.,, -'...... g , Tool; the button,.. .nim'ii" ! So totttaC wheel,Bri'" 161 fwearsBsyltoi ''""" 1Di U Umbrella stand.................... ? V Valve, union check, Greer.....372 Valve, slide, lap and leac1....... 280 Velocipede brake, Mon......... 349 Velocipede, Hemmiui........... ou Velocipede, Hill's... i's.......... 2M Velocipede, McDr.:-............. 376 Vel ocipede, Prims1..............200 Velocipede, Sac's................ 213 I Velocipede, aes'.................296 Velocipede.u'aray & Yonng's... 369 Velocipedthe Monod............ 20 Velooipej, Topliif & Ely's....... 164 Velockle, Tremper's............ 149 Veloode, Whit's............... 387 Velaajustablejaw, Gardner's... i25 VS' W Walking support, Pallissard's.... 293 Watch escapement, Hietel cfc Geissler's....................... 24 Watch protector, Pease's.......... 402 Weather-board hook, tester's 392 Window weight pullev, Bicknell's 116 Wire snears aad pliers.......A..... 4 Wrtoa-pulBing maohlaei Burg- Wat1?.,5....................i Miscellany Figures preceded by a Star () refer to Illustrated articles. A Absinthe............................ 215 Accident to Prof. Bunsen......... 394 Administration, the i.ew..........185 Adulterations of food.............195 Aerial inhabitants................. 41 African interior, lecture on...... 51 Agricultural implements.........211 Agricultural machines..........54,166 Air guns, noiseless................ 182 Alps, among the.................... 390 Aluminum..................167,242,3S6 Ambergris.......................... 259 American antiquities..............200 American association for advancing science......................375 American engraver, earliest......294 American guns, foreign contracts American 'institute Exhibition. 7.' 3J1 American Institute lectnres...... 10 Ammonia for snake bites.......... 231 Amffiba, the........................274 Aniline black.......................S53 Aniline, new uses of...............391 Animal, a new...................... 148 Animalizing vegetable fabrics__294 Annals of Iowa.....................132 Answers to correspondents, 13,29,55, 92, 108,12t, 140,155,172,187,204, 21J, 23a, 251, 267, 283. 300, 315, 832,364,380,395,411 Antimony..........................869 Apothecaries' act, the new........8*52 Apple worms........................*403 Archaeological..................... 58 Archaelogtcal and geographical.. 91 Architecture, modern and medieval. ............................328 Arctic and Antarctic oceans......1(8 Areas calculated from weight... 279 Arms in Persia, manufacturing.. 27 Artillery powder in England.....154 Association, Planters, Manufacturers', etc......................294 Association, scientific and me- chanicitl.........................281 Astrology and astrologers........*339 Atlantic cable, insulation of......20.S Auger regulator.................... 86 Auroras, theory of.................S89 Auroral currents...................324 Auroral display April 15th........299 Axiom, what is an................. 105 B Babbitt's attrition metal..........860 Balloon project, another.......... 116 Balloon, the captive...............402 Barometers, Guyot'slecture on.. #5 Beams in walls, fastening......... 264 Bean sheller wanted............... 71 Beard, uses of the..................215 Beauty in art, producing.......... 161 Bedfordian system of astronomy. 339 Bees, burrowing...................#180 Beet root sugar, 202, 219,. 234,244, 250, '261, '276,291, '308, Ml, 338, Beet root sugar, American.....57, 247 Beet root bugar, new process for. 375 Belts, specimens of large.......... 92 Benzole, beware of................ 183 Berlin cast iron.................... 25 Bermuda tioating dock. .......... 7 Biography of James Watt........'297 Bird friends and insect enemies.. 107 Birds, skinning and stuMiig.......266 Bisulphide of carbon, poisonous eH'ects of........................ 183 Black walnutpolish. ..............372 Blacking, india-rubber liquid.....232 Blast, a monster....................263 Blasting at the Hoosac tunnel__ 27 Blazing stars........................328 Bleaching wood pulp.............. 104 Blood, transfusion of.............. 122 Blowing a wineglass..............295 Boiler explosion at Elizabeth-port.............................. 88 Boiler explosions, causes of___75,263 Boiler testing and examlning..l82,282 Boilers, capacity of................359 Boilers, ooojnnction of............359 Boilers, imperfect.................. 163 Bones, utilization of...........147,373 Bookbinding, medieval........... 290 Boys learn trades, why don't, 119,183 218,266 Brains, the valnc of................S23 Brass chains for gaseliers..........244 Breadand biscuit..................215 Bread making, Liebig on..........387 Bread, Vienna white............... 69 Breech-loader, thenew............ 75 Brick machine, the Gard.......... 139 Brick-making In Scotland........306 Bridging the Connecticut......... 76 British government and inventors.... :.........................211 Bronze powders, manufacturing. 98 Bronze statues, how cast..........376 Buffaloes vs. telegraph poles.....275 Building, cleaning exterior of___824 Bureau of printing and engraving..............................295 Butter, 4 lbs. from 1 gal. milk.....119 C Canadian patents.................. 201 Carbolie acklas a preserver......370 Carbolic acid, how to nse......... 346 Carbon printing by single transfer...............................187 Carbonic acid gas from wells, etc.............................54, 08 Carbonic acid in the air............ 89 Carriage, new method of..........242 Cart wheels, large and small......373 Casks rendered impervious.......261 Casting metals, progress in........346 Cement for glass and metals...... 101 Cement for knife and handle......407 Centenary of ttie steam engine... 297 Central Asia, exploration of...... 11 Centrifugal force.................. 118 Cerium............................136 Chair, a California.................S42 Chair factory, Tennes.v'e..........244 Chair wanted.......................312 Chairs made from ga: pipe........ 342 Changing clothing................. 315 Charcoalfurnace product.........151 Charcoal pipeB..................... 209 Cheesand nuts....................loi ChemiSU cleanliness.............. 100 Chemicitaauivalcnts..............184 Chemicalhfention................121 Chemistry and constructive science... L.................... 393 Children's Aidbciety............ 24 China and the UVted States___ 43 Chinese in Alaska*.............. 26 Chinese labor in AlMca........387 Chrome green.......:m.........351 Church marketlnflewTfcrk......343 Circle in square, circuHference of......................!?L..... 23 Circle, quadrature of the...It.... 44 Circumference ot circle, SQgw found......................... 86 Client, a n appreciative...........TttW Climate ana removal of forests.. Af Clock making in Bristol, Conn... 71 Clocks and clock towers..........242 Clothes wringer, selecting........344 Cionds, formation and phenomena of...........................323 Coal ashes as a fertilizer........... 81 Obal miner in BritishParliament. 38 Coal miners' combination........377 Cloai or sun......................... IU Coal tar as a wood preserver.....S7 Coalpit In England, deepest...... 43 Coast survey, United states......199 CobdenClnb medal...............183 Cocoanuthusk fiber...............263 Coin, new alloy for................ 72 Colors, contrast and admixture of..............................257 Colors of tlsh capricious..........306 Colors of plants and flowers...... 314 Colors, transparent................ 91 Coloring of marble, etc............153 Combustion from steam radiators. 26 Commissioner of Patents, Report of................................ 82 Commissioner of Patents, the new..............................281 Commlssionership, unfit persons for. .............................265 Conceptions of the infinite........ 10 Congealing water.................. 182 Constant battery, cheap form of.. 53 Consumption and the trades and professions.................... 18 Copper culinary utensils..........251 Copying ink.....................308,374 Coral reefs.......................... 119 Corcoran Art Building............356 Corn flour, Jones and Standings'. 185 Corn starch, how made............198 Correspondenta, toour............299 Corundum wheel, truing.......... 344 Cost of going ronnd the world... 4 Cotton for manufacturers, un- fflnned.......................... 53 Cotton goods, dyeing and print-Ing........;..:..,?.......:.....'386 Cotton mannfactnre in the South. 2 Cotton mannfacture, statistics of. 194 Cotton, shipment of unginned.... 295 Cotton thrashing machine wanted.............................. 342 Crank and its improvers.......... 54 Crank and its powers..............#229 Crank and rotary.............. 151 Oank pins, locomotive........182,197 Crank o. pulley................. 404 luosote asluci............ ' 342 Croquet.game of................373 Crows'valnc to farmers........312 Curiosities of handicraft..........103 Cylinder contents in gallons, 182, 215 278 D Darlen ship canal..................153 Darwinian theory...................393 Death of James Harper............250 Dentistry, cxpressional..........27, 70 Dentistry in Japan................168 Dialysis, applications of...........279 Diamonds and diamond cutting. . 390 Diamonds, fluorescence of.........390 Diet, effects of improper.......... 90 Digging and dredgiug machines needed.......................... 86 DIghton rock inscription..........203 Disease, essence of.................177 Diseases of metal workers........325 Drawing paper, stretching........ 164 Drowsiness, how remedied........185 Drunkard's enre....................S60 Dunderberg not a failure.......... 8 Dnssance and Piesse, Messrs...... 23 Dust.................................829 Dyeing in France...............191,210 Dyeing, salt-cake in................ 66 Dynamical levers........2,214, 277, 311 E Earth closets.......................313 Earth's periodic oscillations...... 69 Earthquake convention........... 67 Earthquakes........................ 171 Earthquakes land-makers, are___137 Earthquakes yearly increasing, are.............................. 151 East River bridge.......28, 201, 244, 294 Eating as not a line art............ 313 Ebony, artificial.................... 166 Eccentric and crank.......*21,118,119 Editor! at summary 11,28,43, 59, 76, 99.123,131,155.171, 187, 203, 235, 267,283,295,315, 331), 847,363,379, 895 Electric telegraph wave time.....231 Electrical machine, Trinity College..............................227 Electricity, experiment in......... 120 Electricity, latest novelty in...... 98 Electro-metallurgy, improve-. mentsin......................... 184 Electromotors, vegetable.........339 Elevated railway, N.T. city......123 Emery wheels how made.......... 56 Employers and employed.........29a Enameling ironware..........103, 154 Engine horse power, measuring.. 197,231,245, 278(2), 311 Engine mannfacturer'8 proposition.............................. 230 Engines, economy of short stroke 165 Engines, immense.................. 52 Engines, portable.................. 117 Engineering difficulties how overcome. ........................... 305 Engineering, kid-glove............345 Engineering, modern..............180 Engineering, underground........ 162 English Channel bridge...........363 English railway trains, connection on.......................... 186 Engravings copied on stone.. .259, 278 Enterprise, opportunity for....... 71 Examiner in chief, the new.......281 Example, a good................... 164 Excitement a disease of society.. 878 Exhibition, Holland international 196 Experiments by Prof. Tyndall___ 75 Experiments by telegraph on time............................. 195 Experiments with heavy guns___358 Explosion, locomotive boiler.....118 Explosion of a gasometer......... 873 Explosive compounds.........327, 329 Explosive compounds for engineering...16i, 226, 243,259,271, '807 Explosive, the new................814 Extensions, applications for... 12, 155, 220,53o, 285,300,316,332,366, 379 Eyes, something about............894 F Facts us. philosophy.............811 Falsetto voice......................342 Fanners' wantloading rake..... S Farming, amateur and scientific.. 307 Fell's railway over Mont Cenis... 871 Files, how to elean................. 184 Financial condition of the Sonth. 7 Fireworks, spontaneons ignition Fleece'wb'oi, to wash"!"".!!"!!!I 890 Floor coverings.................... 259 Florida Keys how formed.........370 Flour, Horsford's prepared........135 Flux, what is a..................... 806 Flying machine a possibility...... 169 Food reqnired to sustain life..... 67 Fort Montjomery explosion...... 39 Forts of masonry, lnntility of___ 41 Franking privilege,abolishing___ 9 Franking privilege, abnse of__ 41' Free trade........................855 Freezing of submarine water pipes.......................... 25 French Atlantic cable..........104, 328 Fresh meats transported to market...............................211 Fruit, conserving.................. 188 Fufl, waste and economy of... 123, 131,147,166 Fnrnace. good puddling........... 166 Furnaces for smelting glass.......211 Fusel oil, what is................... 12 G Gaftanizing iron................... 227 Gamu process of treating meat 202 Gas turners, placing...............403 Gas by quality as well as quantity 818 Gas.CheaN,................229,295, 311 Gas monopolies.................... 202 Gas ou solpbourd..............;. 183 Gas, valuaamflmrlty of...........823 Gaswhat it Is and howmade___179 Gasworkslime ntilized........... 88 Gaslight, the new French........42, 54 Qaaoline gas, danger from......86,150 Gear teeth, laying ont.............229 Gearingform of teeth..;.........*165 Gems, fictitious....................198 General Dyer's vindication.......377 Geographical and archaeological. 11 Geological survey of Ohio........132 Giffard injector, applications of.. 169 Glaciers and the American continent............................. 44 Glaciers, descent of...............260 Glass blowing and bottle making 90 Glass, composition of.............. 36 Glass madebyrolling..............214 Glass stainingchurch windows.. 17 Glassware, pressed and cnt........199 Glne for cementing................183 Glycerin for preserving marine animals.......................... 343 Glycerin, uses and abuses of...... 107 Gold beating....................... 296 Gold, bulk of the world's.......... 19 Gold leaf protecting from sunstroke..........................215 Gold refining.......................242 Golden hair now obtained........258 Grain mills in Hungary............215 Granite how affected by fire......356 Gravitation causing solar heat... 262 Grindstone and its uses. ..........389 Gun-cotton, new mode of urine.. 276 Gnn-cotton, new property of..... 40 Gnnpowder, the Schnltze white.. 321 H Habits of mechanics...............298 Hadrosanrns on the stage.........103 Hair of men and animals.......... 106 Hair washes, dangerous........... 3 Harbor defenses.................... 132 Hatsand hatting................... 18 Heatand steam....................248 Heat to bake bread................ 99 Heat working and warming.......105 Heating 0 f buildings......365,311,359 Heaton-Bessemer correspondence 55 Heaton process, chemistry of..... 82 Heaton process, Dr. Mallet on the 226 Herculaneum, excavations at..... 312 Herring fishery of 1868............ 8 Highways of travel, natural......233 Holyoke dam....................... 71 Hoosac tunnel, contract for...... 53 Horse power of engines, estimating...........197,231,245,278(2), 3U Horticultural protection.......158, 217 Hotiair furnaces and health... 811, 359 Hot spring in Nevada..............101 Houses, how to build..............179 Houses, straw-slab.................231 Human degeneracy................ 65 Human hair, trade in.............. 198 Human wheel and its rival........ 25 Hydrogen as illuminating gas___294 Hydrogen gas theory............86, 151 Hydrogen, Graham s ex perlmente with............................. 244 Hydrogenis it a metal........... ISO Hydroscope, the.................... 199 Hygienic Ice chest.................S62 I Ice, air bubbles in................. 44 Ice, expansion of................. *21 Ice-making machinery wanted... 859 Ice wall about the Polar sea.:___ 23 Iced water supplied to Paris...... 1 Idiosyncrasies......................249 Idiots, education of................ 186 Immigration, the present rapid... 393 Incrustations on iron..............197 Induction coil, the great..........841 Induction coils, new...............390 Ink from elder......................180 Insane people, colony of..........294 Insects' wings, velocity of......... 242 Insurance companies and insurers 9 Interior Department, room for... 103 Invention Bnreau.................. 3 Inventions patented in England by Americans.12,55,93,109, "0, 156,173,189,287,258, im, 831, 349, Inventions, value of small........' 75 Inventor,a noble................... 8fil Inventor, a. prolific................238 Inventor, a successful.............228 Inventors, generous............... 184 Inventors, obstacles to snecess of 73 Inventors, suggestion for......... 99 Inventors, trials and triumphs of. 153 Iron by the Ellershausen process 118 Iron by the Heaton process.......218 Iron by the Radcllffe process.....199 Iron, economy wanted in smelting............................... 392 Iron new and scrap for steamer Iron refined'without puddling..'.. 53 Ironstatistics of its prodnction S23, 338 Iron with chromium and titaninm 88 K Kenosha steam frigate............ 8T Kerosene lamps, extinguishing 151.213,278,827,374 Kerosene lamps, safety in-using.. 119 Kerosene oil, Prof. Chandler's report on.......................... 74 Kerosene oil test...................168 Kindling-wood business...........231 King-crabs and cancerine.........362 Krupp's works.....................337 L, Labor and capital not antagonistic................................ 89 Labor-saving machinery and labor.............................. 73 Lamp flames........................ 231 Lamp, improved safety... *..... 215 Lapidaries' wheels, chrome iron for.............................._ Leather, tanning................... 178 Lenses versus drills................ 148 Liebig on unfermented bread___ 70 Life-saving apparatus at sea...... 363 Light on oils, effect of.............248 Light, Tyndall's lectures on......328 Lightning rods................38,85,13.1 Limekiln at Ingleton, Eng......... 183 Liquefaction 01' gases.............. 263 Liquid fuel in France..............118 Liquors, adulterated.............. 44 Lithography, invention of.........181 Locusti, 17 and 18 year............. 195 London Times, how printed....... 402 London underground railroad___106 Long-tailed comet..................2% Lumber of the upper Mississippi. 807 Luminosity of flames..............225 M Macadam and macadamized roads 38 Machinery and mental cultnre 311,374 Man how affected at great altl- tndes............................ 195 Man, snpposed geological traces of................................ 19 Man the living machine........... 65 Manganese used in the arts....... 66 Manufactures in Holyoke......... 83 Manufactured articles deteriorated............................... 217 Manufacturing at Pctersburgh, Va..............................150 Manufacturing, mining, and railroad items 12,29,55, 92,108,124, 139,156,171,187, 203,219,285, 268, 283, 331, 847,364,379, 395, 408 Marble, art of coloring........153, 170 Mastodon and mammoth period. 20 Matches, safety.................... 242 Materials of the universe......... 8St Mathematical science, utility of.. 19 Machanio, 3 natural,..............148 Mechanics, news for.............. 51 Mechanics pretended.............201 Mechanical labor why objectionable.............................169 VIechanical practice at home..... 8 Mechanlcalskill of savages....... 60 Mechanical toys for instruction.. 217 Memory, the burden of............249 Mercury and sulphnr..............199 Metals, transmutation in..........152 Meteors, origin of............."21, 23 Meteorology....................344,378 Mica................................. 24 Mice, novel method of catching.. 72 Michigan, growth of............... 69 Microscopeits power how found 150 MiHew in cotton goods prevented 91 Military cart...................... 88 Milling, question about...........295 Millstone explosion................228 Mines of Nevada................... 19 Mines of the West.................244 Mineral, anew.....................215 Mississippi State fair...............343 Modern engineering...............877 Mosquitoes......................... 843 Motion, law of...................... 359 Motions in the nniverse, sum of.. 185 Monse, white footed...............363 Museum of machinery............. 102 Musical instruments, modern___123 Mnsical intervals..................346 Mnstard, manufacture of..........292 N National statistics, valuable...... 51 Natnral history, lyceum of.....87, 98 Naval engineering, acts of bureau of................................ 55 Navigation, central lake.......... 78 Navigation of the Mississippi..... 41 Seed long required supplied..... 280 Negatives from engravings.......183 Nero's golden house...............308 New Orleans elevator............. 28 Newspaper binder................. *21 Niagara Falls to run Buffalo machinery..........................182 Niagara international bridge.....203 Nltro-glycerln exploded In oil well.............................184 Nltro-glycerln ,JV. y. Tones on... 361 tfitro-glycerin, safety.............392 North American continent, evolution of........................ 35 North Sea, discoveries in the.....152 O Obituary of Dea. I. Washburn.. 43 Obituary of Elbert Perce.......... 92 Obituary of John Cassin........... 72 Obituary of Luther Atwood......228 Obituary of Prof. Wm. E. Jillson. 7 Obituary of Rev. Patrick Bell___863 Ocean telegraphy.................. 858 Office to fill, important............ 263 Oil anong the ancients............354 Oils for railroad engines.......... 40 Oils, safe illuminating............. 183 Oils used in painting.............. 187 Opals and iridescence.............. 98 Opium cultivated in United States S82 Ordnance, experiments ou heavy 370 Ordnance, report on...............151 Organs, electric actionefor.......817 Oven,philosophy of the........... 58 Ozone in the atmosphere..........210 P Pacific railroad and Darien canal. 4 Pacific railroad, the northern.....199 Pacific Railroad Time Ta Be......406 Pacific railway, completion of___329 Pacific railway imbroglio.........265 Pacific railroads, Senate Committee on...........................307 Paddle vs. screw...................892 Paint for metals exposed to sea water............................231 Painting, remedy for evils of..... 33 Panama hats how made...........168 Paper collars, finish of............262 Paper from okra................... 135 Paper making fifty years ago.....278 Parafllne, manufacturing......... 162 Parafflne wax...................... 215 Patent casedesulphurizing ores 203 Paten*easeGiffard's injector... 152 Fateni eases in court..............288 Patentclalms,publication of.___ 89 Patent consists in what...........107 Patent decision about designs 32?, 331 Patent decisioncanals kept from freezing.........................347 Patent decisionhoop shirt.......408 Patent decisionrejected canes Patent deflsionstretching chain, w6 Patent fees, decision upon........406 Patent decision steam pump valves..........................124 Patent Office affairs............329, 356 Patent Office before Congress.....265 Patent Office coutracts___57, 121,152 Patent Office decisions............857 Patent Oflice fees..................182 Patent Office, reformation in.....3!3 Patent Office rubbish..............875 Patent Oflice, vigor at the.........407 Patent rights, threatened cxtinc- of............................402,407 Patent system defective, is our... 106 Patents, commissioner of.........331 Patents, examining applications for...........................133, 169 Patents, how to apply for.........858 Patents in England, value of...... 151 Patents, one-sided reciprocity in. 346 Patents, property in............... 325 Patents, recent American and foreign 12,29. 45. 61,76, 93,108,124, 13?, 156,172,188,203,2#, iS6,252, 268, SB*. 800, 816,832,348, 364, i!80, 396,403 Peat.............................230,245 Pendulums, interference of......,#2*5 percussion capexperiraents......386 Perpetual motion..................296 Petroleum at Wlsmar, Germany. 27.-petrolemogases, dangers of...... 28 petrolenmimportant discovery 376 Phelan prize billiard cue..........357 Phosphorescence of sugar.........359 Phosphoric light................... 16S Photographs In quinine...........387 Photographic relief engraving... 51 Photometer, lecture on the...... 87 Pictures, improvement in finishing............................... 58 Figment, new Amcriean.......... la Piles driven by gunpowder.......295 Pins, manufacture of..............290 Pipe lightwanted.................. 52 Pipestone quarry,Iowa...........132 Planetary discoveries............. 7 Plow wanted....................... 214 Plugging screw and brad holes... 19 PocKet paper, Japanese...........391 Poisonous drugs and cosmetics... 2 Poisonousdyes..................... 263 Poisonous odors................... 151 Polar sea, the open..............23, 86 Poppies and opium.............264, 842 Porcelain, origin of................ 4 Postal telegraph bill..............281 Potassicsudoiatcof wool........185 Potato digger......................241 Potters' glazings, recipes for......357 Poultry, how the French f.tten.. 100 Power as square of velocity. .151, 1SJ Power consumed bydrills........387 Power of attention................ 358 Power of tile crank................214 Power required for velocities___811 Power stored, sand for............ 23 Power, transmission of........214, 260 Pressure, whatis..................S6i Primeval chemistry,lecture on.. 74 Primeval flora, lecture on........ 34 Printing in colors advance step. 7 Progress in art and science....... 19 Propulsion, non-rotary............230 Propulsion of vessels.............. 44 Protection and free trade.........21 Protection as a conservative element............................ 186 Protection to American industry 73,118 Protoplasm......................... 266 Publications, new 12.29,60,92,124, 139, 1T2,189,206,220,236, 251,267, 800,316, 332,363, 379, 409 Pumps, large centrifugal..........246 Pumping long distances........... 25 Pyramid, the great.....:.......... 263 Q Qualitative analysis...............845. Qnicksitver and iron.............. 183 R Rabbit plague of Australia....... 86 Kail, combination................. 54 Railroad building, winter......... 51 Railroad rail, combination........218 Railroad stocks, watering........373 Railroads benefiting farmers..... 23 Railway, narrow gage............. 53 Railway restaurants............... 182 Railways, wooden..............11, 167 Rainfall............................. 22 Rat proof buildings.........91,197, 264 Rays, calorific and luminous.....279 Reaping machines, Hnngarian trial of..........................260 Reason, what is the................151 ReciprocityMr. Greeley'splan. 26 Reforms needed in household articles............................ 28 Register for business men......... 59 Reptiles, transformation in....... 20 Resistance as the square of velocity..............:.........70,278,342 Resources of the great West......378 Right rather than the left, wHy... 89 Rolling mill gearing...............SB Hope, a monster....................280 Royal Astronomical Society, bad for............................... 52 Russia sheet iron..................218 8 Safes, alnm and plaster filling for. 279 Sal soda and soda crystals........ 119 Salt mines, the Polish............. 145 3awmill, a California.............. 150 Scenting, deodorizing, ventilating..............................186 School of Mines, Columbia College.............................. 23 Science and arts, notes on..........371 Science, what is.................... 10 SCIENTIFIC Amebicas, 3,7, 3SI, 71,134, 150,166,407. Scientific museum destroyed......355 Scientific publications, periodical..............................186 Scientist, luventor, and mechanic..............................2" Sea cables...........................401 Seasickness, remedy for.....;.....151 Sensations In a balloon............ 11 Sewage, collecting and utilizing. 324 Sewing machineits origin, etc.. 246 Sewing machine, driving power.. 407 sewing machines and female health...........................378 Shafts and pitmans................*69 Shafting, hollow vs. solid.........187 Shafting, pulleys, and belts..247, *340 Sheep protected from dogs....... 24 Shelbourne submarine drill....... 9 Shiftlessness of an artist...........231 Shops, proper arrangement in 407 Shot-gun barrels................... 118 Siam, the late king ot.............. 10 Silicates, soluble................... 122 Silk manufacture in California.39,213 Silk, why notgrow our own...... 24 Silver extraction..................S86 Silver wares, protection for......389 Singing mouse..................... 262 Skate patents...................... 194 Skill exchanged for labor......... 43 Skyits blue color.................151 Slate tiles and slabs................831 Sleep, going without.............. 91 Sleepyhollow chair................ 859 Small pox and vaccination........232 Smokestack, fall of a..............311 Smoke-house, cheap and good.... 72 Smoky chimneys...................260 Snails for food and trade.........395 Social clubs for mechanics........ 84 Sodium for phosphorus in matches................................858 Sodium kept untarnished......... od Solar engine, another.............. 84 Solar heat as a motive power.....227 Solar system, birth of the........ 89 Soles of india-rubber..............243 Solution............................ 185 Spain, remlniscenes of travel in. 10, 26, 4-j Spectacles.......................... 358 Spectroscope, lectnre on the......115 Speculative topics, discussion of................................339 Spring diseases.................... *ai Spring freshets, the................309 Springs, intermittent..........193,'229 Springs, power and uses of.......266 Stars, heat of.......................292 Steam boiler explosions........... 22 Steam boiler inspection, etc....... 250 Steam Boiler Inspection, etc., Co. 308 Steam engine, Improvements in.. 361 Steam engine indicator......22(8),876 Steam engines, setting np......... 22 Steam engines, testing......54,119,310 Steam expanding......197,230,310,350 Steam flre engines, introduction of................................ 89 Steam hre engines, trial oi........So Steam from maple sap............. 99 Steam igniting combustibles...... 9 Steam increased by superheating. 57 Steam indicator, applying the.... 337 Steam on canals.................... 44 Steam pipes, condensation in..... 8 Steam power, NUes Register on... 54 Steam power, transmitting....... 73 Steam road roller.................. 394 Steam, superheated.............. 99 Steam, the law of..........246,262,811 Steamer resistance as sqnarc ot velocity.................119,151,182 Steamships, the safety of..........120 Steel and iron cast-welded........213 Steel castings, applications of___250 Steel tor axes.....................22,70 Steel for gravers...................113 Steel ornaments, polished......... 25 Steel, something new in........*68,131 Steel under pressure, casting.....2*27 Stereotyping, inventor of.........114 Stewart's new model dwelltng.201,308 Stone, a remarkable................ 18 Street cars, management of....... 91 Stucco work.......................106 Study, do laboring men have time for............................... 57 Stuffing small quadrupeds........3j4 Submarine drill, trial of the Shel- Donrne.......................... 71 Submarine drilling and blasting. y Suction of sinking bodies........ 165 Suez canal, the..................... 39 Sugar and sirup, Louisiana__147,227 Sugar from pumpkins.............276 Sugar Insect, the,.................. 83 Summer recreations..............888 Sun the origin of rorce on earth., las Sunflowers Influencing miasma... 85 Suspension bridge, the Cincinnati..............................2!7 Sword fish, the..................... 30 Sword hunters of Abyssinia...... 23 T Tank, condenser, water heater.... 119 Tanning leather..............3, 253,293 Taps and reamers, finishing.......134 Taps cutting varying threads.311, 890 Taps, tempering.................... 91) Tarantula of Texas................#38d Taste and smell, cew theory of... 234 Tea culture in Tennessee.......... 227 Tea-kettle, Silltman's lecture on the..............,................ 6 Tea-making, philosophy of....... 88 Tea plant............................215 Telegraph lines and anrora bore- aTis."............................ 857 Telegraph verdict..................876 Telegraphs vs. rogues............. 184 Telescope, Chicago equatorial.... 198 TelegraphsEurope and the United Statea........................183 Tent covering......................18* Terms,accuracyin use of........13! Testimonial, a valued.............261 Textile fabrics, treating........ .. 3 Timber, preserving................ 233 Time as a measure of force.......249 TitusvIIle.Pa....................... 464 Tobacco pipes..................146,168 Tolling great bells.................258 Toothache, cure for................295 Toys at the French Exhibition.... 244 Trade mark case, important...... 25 Transits of Venus in 1874 and '82.. 281 Transmitted light, effect of.......359 Tree mining........................ 29!) Trees, age and size of..............275 Trees destroyed by street gas___273 Tubing, indi a-rubber.............243 Tunnel under Dover Strait.......104 Tunneling street crossings........ 248 Tunnels, under-sea................ *0 Turbine wheels, testof............390 Turning tool for rubber wheels.. 311 Twig girdler, the..................*JMS Type-setting and distributing machine...?................._313, 302 U Umbrella wanted................- 4 Underground life.................. 391 Useful men, personal sketches Of..................,............. **0 \ Vapors, inflaming point of........ 215 Variation in domestic produc-__ tions.............................M2 Vegetation and miasms........... Velocipede, inventor of........... 48 Velocipede notes, 25, 56, 6i, 8i, 101, '111, 131, "149.170, '1S1, *196, "2W, 228,251,267,283,314,343, 401. Velocipede patents................267 Velocipedes in Europe............330 Ventilating fans, new mode of working........................327 Ventilation in buildings.........."-B8 Vesuvius on the rampage......... * Vibration of bells cuntainin; water...........................374 Vinegar, manufacture of..........215 Visincrtise.......................... 297 Vis viva and inertia.,.............217 W Wakefulness, therapentics of 115 Walking, mechanics of...........201 Wall street sensation.............. 28 Walla Walla valley................ 3i8 Waste............................18 7,1)93 Watches voice from St. Lonis on. 21 Watch-glasses how made.......... 147 Watchmakers, challenge to.......2W Water acting on lead..............27n Water consumed by a boiler......359 Water discharged under dilterent heads............................118 Waterfalls, utilization of high.... 226 Water pipes, galvanized iron. .82, t27 Water power of the Connecticut. 71 Weed cutter wanted...............359 Welding copper.................... 275 Welding powder...................** Whale, a mechanical.............. 187 Wheel, Axle, and Sail.............. 4 Wheels for vehicles, large.....842. 374 Wheels of vehicles dynamical levers...........................277 White lead, testing the value of.. 298 Window glass...................114, ISi Wire ropes and chains for hoisting ores.........................355 WomeS as farmers.................37o Wonders.ancient and modern__345 Wood engravingancient process..............................308 Wood preserved from decay...... 8 Wood printing and graining......209 Wooden paveme. t.................344 Wooden pipes, laminated..........259 Wool Manufacturers' BuMelin.....138 Woolen manufactures, American and European.................. 163 Woolen manufacturers, important to............................180 Workingman, how get a house.... yJ Workingmenfs intcilectual improvement...................... 121 Workmen.honor of................ 41 Worms and worm wheels.........*277 Wrench how made................'3H9 Wrenches, history of..............*Uii Write legibly and intelligibly.... 232 Y Tear 1868 eventful.................. Yellow wood.......................215 Yeast, how to make good......... 165 Z Zinc as a building material........180 Zinc for roofing................116,293 Zinc in reducing gold ores........276 Zirconia light...................... 87 Zodiacal light..................... 86Patent Claims Patents, issned Dec. 15,'68.......13 " 22, '63.......3D " 29, V.......45 " " Jan. 5,'69. .....61 " " 12,'69.......77 " " " 19,'69.......93 " " 26,'69......Kill Feb. 2!'69......125 " " " 9,'119......140 " 11), '69......157 " " " 23, VJ......172 " " Mar. 2,'69......188 9,'69.....205 " 16,'69......241 " " " 23,'M......23(1 " " 30,'(i.l......252 " " April 6,'6!J......269 -' 13,'6s)......an " " " 20,'89......301 " " 2/,'69......Slli " " May 4, IB......338 " " " 11,'(H......31s " " 18,'69......3l!5 " " " 25, '139......Sdl " " June 1,'6J......37 " " 8,'69......404 RsisstJES, list of, 14, 30, 46,62,77, U, 110,126, 142, 157, 1M, 189,205,222, 237,253,2H'J, 2S5, 803, 317,3*1, 1, S8ti,38S,3M, 10J. Dusigns, list of, 14, 30, 4G, B2,77, 94, 110,142,15J, 173, Ml, afl, 253,21)9, 285,317,834,34a, 30G, 332, CM, 403. Extensions, list of, 77, 1U.205, SS3