Patents- February 16, 1889

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MESSRS. MUNN&CO., in connection with the publication of the SCIENTIFIC AMERICAN. continue to examine improvements. and to act as Solicitors of Patents for Inventors. and now nave for the preparation of Patent Drawings, Specifications. and the prosecution of A pplicationq tor Patents in the United States, Canada. and Foreign Countries. Messrs Munn&Co. also attend to the preparation of Caveats. Copyrights for Books. Labels, Reissues. A ssignments. and Reports on Infringements of Patents. A 11 business intrusted to them is done with special care and promptness. on very reasonable terms A pamphlet sent free of charge. on application. containing full information about Patents and how to pro' cure them; directions concerning Labels, Copyrights, Designs, Patents, Appeals. Reissues. Infringements, Assignments, Rejected Cases. nints on the Sale of Patents, atc. We also send. .treeof charge, a Synopsis of Foreign Pa. tent Laws. showing- the coRt and method of securing patents in all the principal countries of the world. MUNN CO., Solicitors of Patents, 361 Broadway, New York. BRANCH OFFICKS.-No. 62 and 624 F Street, Pa- olflc BnHding, Dear 7th Street. Winn, D. C. FOR SALE.-STATE RIGHTS. For the Best F Water Closet inthe World.SANiTARY PLUMBinG MFG, Co., 9lO Webster Street, Oakland, California. HEATING CITIES BY STEAM.--AN elaborate paper by C. E. Emory, Ph.D., discussing the general features of what is technically called a district steam system. and giving a description of the work of the .New York steam Company. contained in SCIENTIFIC AMERICAN SUPPLEMENT, Nos. 639 and 640. Price 10 cents each. To be had at this office and from all newsdealers. THE CUSHMAN KEY DRILL CHUCK. This is an improvement over all other chucks of its class and is fully guaranteed. DIAM. HOI,DS PRICE No. 1. 2 in. Oto M in. 6.50 No. 2. 2K in. 1-ti4 to in. 8.00 Sold by the trade and Manufactured by THE CUSHMAN CHUCK Co., Hartford, Conn. .PATENT JACKET KETTLES, P!run or Porcelain Lined. Tested to 100 lb, pressure. Send f or Lists. HAND, BURR&CO.. 614 and 616 Market O!t., Philadelphia. Pa. TOXICOLOGY, PRESENT POSITION of.--A paper by J. D. Arnold, F.C-S., showing how limit- edis the number of poisons that can bedetected in minute quantities in lost mortem cases by the present methods inuse. Containedin SCIENTIFIC AMERICAN SUPPLEMENT. NO. 6 trt. Price 10 ce nts. Tobe had at this office and from all newsdealers. THE INTERNATIONAL CYCLOPEDIA ERIE ENGINE. WORKS CLEVELAND HARDWICK , WALNUT STREET, ERIE,PA. STATIONARY , PORTABLE , SEML- PORTABLE. COMBINED ,AGRICU LTURAL ENGI N E S.STATIONARY, PORTABLE ,VEHT1CAL BOILERS . INV ENTORS and others desirin", new articlesmanufac- tured and introduced, address P. O. Box 86, Cleveland. O. LAMTFDil CI inrc Microscopes, 2'descopes. MN I tnn vLIULv Spectacles, Barometers, Field Glasses, Photographic Outfits for Amateurs, w. H. WAT.MSI.EY M> BUILDERS' EDITION is issued monthly. '2.00 a year. Single copies; 25 cents. Forty hirge quarto pages. equal to about two hundred ordinary book pages; forming a large and splendid Magazine of A i-chi f ecu ire, ri- ly adorned with elegant plates in colors, and with other flne engravings; illustrating the most intere!lting examples of modern Architectural Construction and allied subjects. A special feature is the presentation In each number of a variety of the latest and best plans for private residences. city and country, including those of very moderate cost as well as the more expensive. Drawings tn perspective and in color are given, together wtth full Plans. Spectlcations, Sheets of Details, Estimates. etc. The elegance. and cheapness of this magnificent work have won for it the Iireest Circulation of any Architectural publication in the world. Sold by all newsdealers. 2.50 a year. Remit to MUNN&CO., Publishers, 361 Broadway, New York. PRINTING INKS. THE Scientific. American i. printed with . CHAS. ENEU JOHNSON CO.'S Tenth and m- bard Sts., Phila., and 47 Rose St., opp. Duane St., N. Y.

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