SCIENCE. 



[Vol. XVI. No. 396 



" I advise all parents to have their boys and girls taught shorthand -writing and type-writing. A ste- 

 nographer who can type-write his notes would be safer from poverty than a great Greek scholar."— 

 Charles Reade, on "The Coming Man." 



Remington 



Standard Typewriter. 



For Fifteen Years the Standard, and 

 to day the most perfect development of 

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WYCKOFF, SHAMANS & BENEDICT, 



New York. 



©AUGRAPH, THE 



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Best for Manifolding. 100,000 Daily User; 



Araericaii fell Teloplie 



COMPANY. 

 98 MILK ST„ BOSTON, MASS, 



This Company owns the Letters 

 Patent granted to Alexander Gra- 

 ham Bell, March 7th, 1876, No. 

 174,465, and January 30, 1877, 

 No. 1§6,787. 



The Transmission of Speech by 

 „.,„,„ n„ f»^ll known forms of BLBCTKIC 



Domble 0*^8% " l\ .'.'.'.' . 85:60 SPEAKING TELEPHONES in- 

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For account of speed contests and circulars, address Company hy the abOVe patents, and 



THE AMERICAN WRITING MACHINE CO. ''e^'lers each individual user of tel- 

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 ENGLISH FACTORY, COVENTRY, EHQlAnJ°'"a^ ^6j„^^ 



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HAKTPORD, CONN. 



Braneli Offices : 337 Broadway, Ne-w.Y 

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JOHNS HOPKINS UNIVERSITY, 



BALTIMORE. 



Announcements for the next academic 

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WORCESTER POLYTECHNIC INSTI- 



TIITr Courses in Civil, Mechanical and Eiectri- 

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Michigan Mining School. 



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M. E. Wadsworth, A.m., Ph.D., Director. 



BOOKS : HoTv^ to Exchange tbem for 

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HANDBOOK v/F METEOROLOGICAL TABLES. 



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 127 pp. 8°. 



A collection of all the tables needed by a 

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Professor Waldo says : "I heartily recom- 

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Professbf' Symons of London says : ' ' They 

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OUB 100 PP. CATALOGUE OF MINERALS. 



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