SCIENCE. 



[Vol. XIV. No. 350 



DAFT ELECTRIC LIGHT COMPANY. 



Power Stations. .^B^^^^^^ Electric Railways. 



Stationary Motors 

 ^2 to 100 H.P. 



Car Motors 15 to 

 250 H.P. 



Executive Office, 1 15 Broadway, N.Y. 



FACTORY, JERSEY CITY, N. J. 



Please Mention "Science.' 



CALENDAR OF SOCIETIES. 



Philosophical Society, Washing-ton. 



Oct. 12. — Everett Hayden, Hurricanes in 

 the Bay of North America ; Frank Baker, 

 Work of the Life-Saving Crews during the 

 Recent Hurricane ; Romyn Hitchcock, The 

 Action of Light on Silver Chloride. 



Engineers' Club, St. Louis. 



Oct. 9. — President Meier presented a dis- 

 cussion of a new tractor recently invented 

 by H. L. Van Zile, an engineer of Albany, 

 New York. The invention had resulted 

 from certain mathematical investigations, 

 and rendered it possible to make the total 

 power, or pulling force, available for traction. 

 A model had been made, which easily 

 mounted a 20-per-cent grade, while the same 

 model without the improvement could as- 

 cend only a lo-per-cent grade. In the dis- 

 cussion, Robert Moore called attention to the 

 similarity of this device to the Fell tractor, 

 which was in successful use on the Summit 

 Railway, over Mount Cenis. Professor Gale 

 spoke of the probable advantages this motor 

 would have for street-railway work, where 

 the grades were serious, and where objec- 

 tions existed to the use of other forms of 

 tractors. Mr. C. H. Sharman then read a 

 paper on " Some Reminiscences Connected 

 with the Construction of the Union Pacific 

 Railroad." Mr. Sharman entered the engi- 

 neering department of this road in 1866 as 

 rod-man, and remained on the- work in vari- 

 ous capacities until the completion of the 

 road in 1869, when he held the position of 

 division engineer. A graphic description 

 was given of the difficulties met with in en- 

 gineering construction at that day at points 

 remote from civilization. Considerable in- 

 teresting engineering data were presented, 

 but the paper in general deviated somewhat 

 from the strictly technical papers usually 

 presented, being of a more popular and en- 

 tertaining character. 



American Institute of Electrical 

 Engineers, New York. 

 Oct. 15. — A paper was read by Mr. 

 Thomas D. Lockwood, member, entitled 

 " Electrical Notes of a Transatlantic Trip." 

 It embraced some observations on teleg- 

 raphy ; description of the London operating 



room, the different instruments employed, 

 the pneumatic tubes, and a brief discussion 

 of governmentally owned telegraphs ; elec- 

 tric lighting as carried on in England; the 

 practice of telephony in Great Britain, certain 

 peculiarities in apparatus and methods ; also 

 the use of electric motors. Some of the elec- 

 trical features of the Paris Exposition were 

 canvassed. 



THE 



COMPANY. 



95 MILK ST„ BOSTON, MASS. 



This Company owns tbe Letters 

 Patent granted to Alexander Gra- 

 ham Bell, March 7th, 1876, No. 

 174,465, and January 30, 1877, 

 No. 186,787. 



The Transmission of Speech hy 

 all known forms of ELECTRIC 

 SPEAKING TELEPHONES in- 

 fringes the rig-ht secured to this 

 Company by the above patents, and 

 renders each individual u>«er of tel- 

 ephones, not furnished by it or its 

 licensees, responsible for such un- 

 lawful use, and all the conse- 

 quences thereof and liable to suit 

 therefor. 



ESTERBROOK'S 

 STEEL PENS. 



OF SUPERIOR AND STANDARD QUALITY. 

 Leading Nos.; 048, 14, 130, 135, 239, 333 



For Sale by all Stationers. 



THE ESTERBROOK STEEL PEK CO., 



Works : Oamden. N. J. 26 John St.. New York. 



Readers of Science 



Corresponding with or visiting Adver- 

 tisers will confer a great favor by mentiorr 

 ing the paper. 



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