SCIENCE. 



[Vol. XXII. No. 558 



Probably you take 



THE 



Electrical Engineer. 



Most people interested ia Electricity 



do. 

 If you do not, now is a good time to 



begin. 

 It is published every Wednesday. 

 Subscription, $300 per year. 



You can try it three months for fifty 

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Address: 



^The Electrical Engineer, 

 203 Broadway, - - - New York, N. Y. 



HANDY BOOKS. 



PRACTICAL ELECTRICS, a universal handy book 



noevery day Electrical matters, fourth edition. 



135 pages, 12V0, cloth, price 75 cents. 



LECTRICAL TABLES AND MEMORANDA for 



Engineers, by Silvanus P. Thompson, 128 pages, 



Illustrated, 64 mo, roan, 50 cents. 

 A SYSTEM OF EASY LETTERING by Howard 



Cromwell, 32 different styles, 50 cents. 

 THE ORNAMENTAL Penman's pocketbook of 



alphabets, 37 different styles, 20 cents. 



Books mailed post paid to any address on re- 

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SPON & CHAMBERLAIN, 

 Mention this paper. . 12 Cortlandt St., N. Y 



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Case One Dozen Half-Gallon Bottles, $4.50. 



Case Fifty Quarts (Aerated), $7.50. 



Bedford Mineral Springs Co., B<idf«srd, Pa. 



Philadelphia Office, 1004 Walnut St. 



Newspaper Clippings. 2S,000 in Stocl£. 

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THE 



Aim M Teleplie 



COMPANY. 



125 MILK ST., BOSTON, MASS. 



This Company owns the Letters - Patent 

 No. 186,787, granted to Alexander Graham 

 Bell, January 30th, 1877, the scope of which 

 has been defined by the Supreme Court of 

 the United States in the following terms: 



' ' The patent itself is for the mechanical 

 structure of an electric telephone to be used 

 to produce the electrical action on which the 

 first patent rests. The third claim is for the 

 use in such instruments of a diaphragm, 

 made of a plate of iron or steel, or other ma- 

 terial capable of inductive action; the fifth, 

 of a permanent magnet constructed as de- 

 scribed with a coil upon the end or ends 

 nearest the plate; the sixth, of a sounding 

 box as described ; the seventh, of a speaking 

 or hearing tube as described for conveying 

 the sounds ; and the eighth, of a permanent 

 magnet and plate combined. The claim is 

 not for these several things in and of them- 

 selves, but for an electric telephone in the 

 construction of which these things or any of 

 them are used." 



This Company also owns Letters-Patent 

 No. 463,569, granted to Emile Berliner, No- 

 vember 17, 1891, for a combined Telef»raph 

 and Telephone, and controls Letters-Patent 

 No. 474,331, granted to Thomas A Edison, 

 May 3, 1892, for a Speaking Telegraph, 

 which cover fundamental inventions and 

 embrace all forms of microphone transmit- 

 ters and of carbon telephones. " 



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ED^AE S. WEENER, Publisher, 



!ii8 a:iifiJ IGlliSlreeS, - - - Ne^v IToife. 



^ 1869. THE 1893. 



Manufacturer and Builder. 



Published Monthly. A handsomely illustrated me- 

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 Every number consists of 48 large quarto pages and 

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HENRI GERARD, 

 P. O. Box 1001. 83 IVassan St., N. Y. 



Oil is the kind used 

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You Ought to Read 



The Popular Science Alews and 



Boston Journal of Cbemistry. 



Only one doUar till July, 1894. 



A scientific newspaper for unscientific readers. 



Address POPULAR SCIENCE NEWS CO., 



5 Somerset St.. Boston, Mass. 



THE WORLD'S FAIR A SUCCESS, BUT 



IT WILL SOON CLOSE ITS GATES 



FOREVER. 



The grandest exhibition of our time and 

 possibly for many generations to come will 

 soon be brought to an end. 



There remains but one month in which to 

 ,'isit this marvelous gathering of all the 

 World's Productions, and everybod)' should 

 strain a point to go to Chicago. 



The railroad fare heretofore has been con 

 sidered a hindrance to all classes, but this 

 has all been changed, and on the following 

 days in October the West Shore Railroad 

 will run high-class excursions on its fast ex- 

 press trains in through cars at one-half its 

 lowest fare, i. e,, $17.00, from New York to 

 hicago and return, and proportionately 

 lower rates from points along its line. These 

 excursion trains will be in charge of an 

 agent whose dutj' it is to care for the inter- 

 ests of the company's patrons, en route, to 

 furnish detailed information as to accommo 

 dations obtainable in Chicago, and to point 

 out the historic points along the grand old 

 Hudson and through the picturesque 

 Mohawk Valley. 



These trains will leave Franklin street. 

 New York, at 1 0.00 A. M., and West 42d 

 street at 10.10 as follows: Wednesday, Oc- 

 tober 4th; Tuesday, October loth; Saturday, 

 October 14th; Thursday, October igth, and 

 'the last, Monday, October 23d. 



LIGHT, HEAT AND POWER. 



THE INDEPENDENT GAS JOURNAL 

 OF AMERICA. 



Published Monthly at Philadelphia. 



Sttbscription, %z.<x> per year. 



Littells Living Age. 



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FIFTY 



1844 



1894 

 YEARS. 



THE LIVING AGE, 



which has rounded out its 



FIRST HALF-CENTURY, 



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 ■ith the ripest thought of 



The Ablest Minds of the Age. 



It gives in a convenient form, a complete compil- 

 ation of the world's choicest literature, Encyclo- 

 pedic in its scope, Character, Comprehensiveness 

 and Completeness ; selected from the vast and 

 varied field of 



FOREIGN PERIODICAL LITERATURE. 



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