The Crusade Against the House Fly Of July 24th, there was instituted in Washington, a most interesting crusade against the common house fly. For several seasons one of the leading daily newspapers of the capital has been printing in display type the legend SWAT THE FLY, but this summer this same paper began its campaign in earnest. Realizing that it is human nature to desire a pecuniary incentive for any public service, several hundred dollars in prizes were offered, one hundred dollars being the grand prize for the greatest number of flies killed, and many other prizes of lesser amounts representing first, second, third and fourth prizes, etc. Only children under the age of sixteen were permitted to enter, the fly-swatting contest. Each contestant is furnished with a fly swatter, and paper boxes for the dead fies were distributed. Each day the boxes contairing the offerings of the workers are collected and the flies so exterminated are first counted at the Health Office, and then cremated. The first five days of the campaign saw the leader in the contest with the proud record of 40,000 flies killed. with a long list of those who had more than 20,000 to their credit. It is interesting to note that the children have organized themselves into squads and range over several blocks of territory, killing the flies in kitchens, grocery stores, stables and refuse heaps. Even out of doors the fly has no peace, but is kept busy dodging this veritable army of determined swatters. Up to date, by actual count, more than 2,000,000 of these pests have been exterminated, and the service performed in the interest of public health is enormous, when compared to the comparatively small outlay of money. The only pity of it is that the campaign had to be financed entirely by private means, and that the municipality of the District of Columbia could not “raise the ante” and make the prizes attractive to grown persons as well. It is not expected that in four weeks of the Evening Star's contest, Washington will be reduced to a state of absolute flyless-ness, but that there will be a slump in next season's crop there is not the slightest shadow of doubt. ConSidering the propagating possibilities of the fly, it would seem worth while for other cities to follow Washington's example in this regard and get the children started. Think of the enormous slaughter of flies there would be on the East Side, for instance, if the myriads of kids, excited by the prospect of winning a handful of dollars, could be induced to “swat the fly." Restoring Hardened Rubber. -Everyone is familiar with the very undesirable change to wnlCh rubber is subject on prolonged standing, such articles as rubber tires becoming hardened and brittle. According to a note published in the Motor World, there is a simple remedy for this trouble, provided it has not gone too far. This consists in immersing the article for a short time in an alkaline solution composed of one part of ammonia to two of water. As an example of the efficiency of this process, an old bicycle tube which seemed beyond restoration was found quite fit for use after half an hour's immersion in such a solution. In explanation of the effect it is supposed that there is a tendency for acids to be formed in the rubber, and that these acids are neutralized by the alkaline solution. On the strength of this, it is suggested that when tubes or other rubber articles are stored, a small quantity of quick lime or ammonium carbonate be included in the wrapping, though it could be kept from actual contact with the rubber. Periodic washing with ammonia and water is also suggested as a preventive. Boston Street Lighting. -The total number of lamps on Boston's streets on January 10th of this year comprised 3,973 arc lamps, 1,206 tungsten incandescent, and 11.742 gas. During the year 1910 the cost of electric lighting was $408,900; that of gas lighting, $277,256. Naphtha lights were used in small numbers during the year at a cost of $1,833, but all of these have now been replaced with gas lights . Municipal Journal. Do you send Valuable Packages by Mail? Government rates 150% higher than Hartford Mail Package Insurance AS a business man whose business requires _C\^ the use of the U. S. Mails for sending valuable merchandise have you ever considered the question of cutting down both the expense and the time of having your package registered by the Government? The Hartford Fire Insurance Company does both by its Mail Package Insurance. For example: A package worth $5.00, weight 8 oz. P. O. Registration . . . . .10 Postage, 1st class, .02 per oz. . . .16 .26 Hartford Coupon .... . 02Y Postage, 4th class, .01 per oz. . . .08 .10Y Saved by Hartford Mail Package Insurance .15Y BESIDES you don't have to go to the Post Office to register the package. Smd today forfull information as to cost of certificate books and method of using. Hartford Fire Insurance Co. Hartford, Conn. 548 SCIENTIFIC AMERICAN December 9, 1911 The accepted sty l e-fabric of universa l wear for the man who cares-OSWEGO SERGE A weave that serves well both tailoT and wearer No suit becomes you like a serge of blue. And of all good serges, OSWEGO SERGE is best of all. Whether this suit of yours be custom-made or ready-ta-wear, it is your right to demand the cloth by name. When you order, specify OSWEGO SERGE. This is what your money buys: Sixteen ounces of pure wool to every yard; a blue, rich in tone, that favors the boy of six to t he man of sixty; a fabric that has body, quality and feel; that holds its shape, drape and appearance. Not only a sty l e-fabric-but economica l , because of its price and durabili t y. AericanWoolen Company Wm.NWood. Presjdent In order to be sure of the cloth when ordering a custom suit from your tailor, or a ready-to-wear suit from your clothier, insist on OSWEGO SERGE the cloth for now. Samples furnished on request. If unable to obtain OSWEGO SERGE, send us the name of your tailor or clothier, accompanied by money-order or check for quantity de s i r ed at $3.00 per yard, and we will see that you are supplied. (3Y yards to a suit.) Order the Cloth as well as the Clothes American Woolen Company of New York J. CLIFFORD WOODHULL, Selling Agent American Woolen Building, 18th to 19th Street on 4th Avenue, New York Mechanically the Jbbo” D IS RIGHT ALTHOUGH a car may be a masterpiece of artistic beauty, a symposium /"\ of beautiful ideas, yet if it is not right mechanically it might as well “ be a piece of statuary or a bit of the landscape. It is its mechanical ability to propel itself that makes it a thing of life - that makes it an automobile. rherefore. the engineers of the Abbott-Detroit have seen to it that this - the most vital thing about a motor car, bas received the utmost cafe and consideration. Mechanically, the Abbott-Detroit is right. No other car has ever endured the terrific punishment-over all sorts of roads-in all kinds of weather - under all changes of temperature and pressure—tbat the now famous Abbott·Detroit . . Bull-Dog” bas. This wonderful machine is a stock Abbott-Detroit “30” Touring Car which over a year ago was started on a 100,000 mile trip around the borders of the United States and tbrough other countries of the Globe. It bas now covered over 40.000 miles of this trip and is on its way to New York where it will be exhibited at the Annual Automobile Snow. It is still in perfect running order. We ha ve just finished a book describing tbis wonderful trip, which will ue sent free upon request. Send for our beautiful Art Oatalogue which describes all tbe Abbott-Detroit models in detail. ABBOTT·DETROIT “44" Seven -passenger, Fore-door Tourmg Car, fully {qu1pped (less Top. WindshIeld. Speedometer and AUXIlIary Seats) $1800 Fore-door Deml Tonneau fully equipped (less top. \lndshield and Speedometer) $1775 Fore door Llmousjne fully eqUipped $3000 ABBOTT MOTOR COMPANY ABBOTT.DETROIT “30" Fore-door Tourmg Car. fully eqUIpped. (Jess Top, W1ndshleld and Speedometer) $1350 Fore-door Roadster. fully equipped (less Top. WIndshIeld .nd Speedometer) $1275 ColonIal Coupe fully eqUlpped $2150 Anv model can be eqUIpped wttb Dynamo eqUlpment for ElectrIC L1ghung $90 Abbott Detroit Self-Starter $50 613 WATERLOO STREET DETROIT, MICHIGAN EXCEPTIONAL OPPORTUNITY TO VISIT South America and Panama Canal 20,000 Mile Cruise, leaving New York Jan. 20, 1912 Calling1 at Port af Spain, Pernambuco, Santos, Buenos Aires (Across the Andes), Punta Arenas (thr?lgh the Straits of Magellan), Valparaiso, Rio de Janeiro, Bahia. Para, Bridgetown, and a VISit to the Panama Canal. Duration of Cruise 80 Days-Cost $350 and up. Exceptional side trips everywhere. Cruises De Luxe to the West Indies. Five Delightful Cruises to the WE ST INDIES Panama Canal. Venezuela and Bermuda Leaving New York by the Palatial Twin Screw Steamers S. S. Moltke (12,500 tons), 28 days, Jan. 23. Feb. 24, 1912, $150 and up. S. S. Hamburg (11,000 tons), 21 days, Feb. 10, March 7, 1912, $125 and up. S. S. Moltke (J2,500 tons), 16 dan. March 26, 1912, $85 and up. Every luxury of travel, every refinement of service msured GRAND ANNUAL EVENT Around the World November, 1912, and February; 1913, by the Large Cruising Steamship, "VICTORIA LUlSE" (16,500 tons). GRAND ANNUAL CRUISE TO THE ORIENT By the most palatial cruising1 steamer afloat, S. S. “VICTORIA LUISE” (16,500 tons). Sailing” from New York, January 30, 1912, on a 78-Day Cruise to Madeira, Spain, the Mediterranean aml the Orient. Cost $325 and upward. The “Victoria Luise” is equipped with modern features providing1 every luxury and comfort on long1 Italy and Egypt Special Trip by the superb transatlantic liner “Kaiserin Auguste Victoria,” the larg"-estand most luxurious steam-erof the service. LeavesNew York February 14, 1912, for Madeira, Gibraltar, Algiers. Villefranche (Nice). Genoa, Naples and Port Said. To or from Port Said. $165 and up. To or from all other ports, $115 and up , Aviation N OTHING so fully illustrates the real up-to-dateness of The Century as that part of it devoted to aviation. This is entirely an achievem ent of the last twenty years. Today if is a fact so real that Grahame -White says that in five years the Atlantic Ocean will be used only to bathe in. Science T HE CENTURY gives the latest research and thought in every department of science -botany. geology, zoology. biology, mineralogy, mathematics. physics, etc. - information indispensable both to the working and to the teaching scientist. The Art of War T HE art of war and the engines by which it i· applied have both advanced materIally in twenty years, This advance is shown clearly by picture and text. by hundreds of new definitions and the eniargemen t of old ones. by pictures of baule.hips, guns and other implements of war. Wireless Telegraphy SINCE the appearance of the first edition of The Century wireles telegraphy has appeared and has become so efficient that it has been used in several instances to preven t disasters at sea, notably in the rescue of the steamship Republic. Business No p ha se of th e dev el opmen t of the wo rld h as b e en so impor tan t in t he la s t tw o de cades as the development of business. New definitions of old words, and a grea t vocabulary of new words, have come into existence. The business man will find The Century a necessary part of his business library. Nature AGREA T educational feature of The Century. is its very complete definitions and illustrations of animals, plants and minerals. including many discoveries in the natuta J world. made since the first edition appeared, all the illustrations of these natural objects are such as to be acceptable both to the specialist and to the layman. Electricity T HIS is a branch of modern science which is closely connected with the progress of modern business and which is also in process of growth and creating history every day. Definitions of all electrica I terms and of many forms of electrical apparatus are wiven, in each case with the latest information. Exploration A MONG the maps in the Atlas section of The Century is a map of the North Polar region, as far as it has been explored to date, with records not only of Peary's various journeys but also of the (outes of all other explorers, with their points of .. farthest north .. . One-fifth of the World's Progress has been made in the last Twenty Years In bringing The Century Dictionary, Cyclopedia and Atlas up to date in the new and enlarged edition just issued, not only has every page of the book been revised, but the neW maller added has amounted to one-fftth of the original work, a striking indication of the world's progress during the past two decades. When The Century was published (J 890-9 J) it was, in its field, the most complete of works of reference. But the world has gone ahead since then with startling speed. The older sciences have grown immensely; new sciences have sprung up; new discoveries and inventions of all kinds are almost numberless; medicine has been revolutionized by studies in immunity and serumtherapy; radium and radioactivity have been found ; aviation and wireless telegraphy have become commonplaces; war has devised new engines for land and sea; and so on, almost indefinitely. And with all this has come a vast host of new words and new facts which a book like The Century must record. In fact, only upon such a foundation as was laid in The Century twenty years ago, could so complete a work today be constructed as The New and Enlarged Edition of THE CENTURY DICTIONARY, CYCLOPEDIA AND ATLAS As a Dictionary, the new revision now defines, spells and pronounces 100,000 more words than the first edition, which defined 120,000 more than any other English dictionary which had preceded it. As a Cyclopedia, The Century has two great points of superiority over any other existing work-the fullness of its information and the accessibility of that information. It has complete, recent and authentic information on every cyclopedic subject-biography, geography, history, art, science or trade-and, in addition, owing to its dictionary arrangement, inslanl access to any detail of this information. It is not necessary to read a long article to get at the isolated fact wanted. 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It must be thick enough so that it can be consulted without the irritation of pulling two leaves apart, and it must be thick enough so that the printing and cuts will not show through the sheet. We considered every kind of thin paper made, and tried it in printed form. We know from our own experience that the paper in the Century is the best for a work like ours, and that it could not be any thinner without interfering with your satisfactory use of the books. Fill out the attached coupon and get specific information about the scope, price and terms of The Century today. Sold only by The Century Co. The Century Dictionary, Cyclopedia and Atlas, in all its editions and additions, including the just issued superb Revised and Enlarged Edition, was edited and published by The Century Co. of Union Square, New York, publishers