SCIENCE. 



[Vol. XIY. No. 340 



Sprague Clectric Rail\iray and Motor Company. 



Bearings Self Oiling. 

 D«=" ^"^.T) NON-SPARKING IN OPERATION, 



Lightest Weight Consistent with 

 Highest Efficiency, 



SIMPLE IN CONSTRUCTION. 

 Not Liable to get out of Order. 



Commutator Wear Reduced 

 to a Minimum. 



16 and 18 BROAD STREET, NEW YORK. 



The Mutual Life insurance Company 



OF NEW YORK. 



RICHARD A. McCURDY, PRESIDENT. 



- $126,082,15356 



ASSETS 



The Largest and best Life Insurance Company in the World. 



The New Business of the Mutual Life Insurance Company in iS 



Exceeded $103,000,000. 



Its Business shows the Greatest Comparative Gain made by 

 any Company during the past year incIudiHg 



A gain ill assets of $ 7,275,301 68 



A gain in income of 3,096,010 06 



A gain in new premiums of 2,333,406 00 



A gain in surplus of 1,645,622 1 1 



A gain in new business of^^^^ 33j756,792 85 



A gain of risks in force . .''f"'bi-_^ ■ .. 54,496,25 1 85 



Tlie MutuaMl^/N,;"" 



Has Paid to Policy-holders since Organization $272,481,839 82. 



Company 



Electric al 

 House 



lEl 



O/d and Rare Books. 



Furnishings. 



32 & 34 Frankfort St., 

 New York. 



One Million Magazines. Back numbers, vols. 

 and sets — old and new. Foreign and Amevican. 

 CATALOGUE UPON APPLICATION. 



A. S. CLARK, 



34 Park Row, New York City. 



JACK NUMBERS : 

 azines. Rates lo 

 Schoharie, N.Y. 



JOHNS HOPKINS UNIVERSITY, 



BALTIMORE. 



Announcements for the next academic 

 year are now ready and will be sent on 

 application. 



FOOD 

 ADULTERATION 



And its Detection. With photomi orographic plates and 

 a bibliographical appendix. By J. P. Battershall. 328 

 pages, 8vo, cloth. Price, S3. 50. Circulars and Catalogues 

 on application. E. & F. N. SPON, 



12 Corilandt St., New York. 



THE 



COMPANY. 



98 MILK ST., BOSTON, MASS, 



Tliis Company owns tbe Letters 

 Patent granted to Alexander Gra- 

 ham Bell, Marcli 7tli, 1876, No. 

 174,465, and Jamiarv 30, 1877, 

 No. 1§6,787. 



The Transmission of Speech by 

 all known forms of ELECTRIC 

 SPEAKING TELEPHONES in- 

 fringes the right secured to this 

 Company by the above patents, and 

 renders each individual user of tel- 

 ephones, not furnished by it or its 

 licensees, responsible for such un- 

 lawful use, and all the conse- 

 quenees thereof and liable to suit 

 tlierefor. 



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 PEN CO., 



Works : Oamden. N. J. -26 .lo'iii .'•t.. «ew Vorb. 



5SNfw 



■mg 



^ IN THE WORLD, (t 



:gold medal; 



Used by Ihousands of first-class 

 lechanics and bv euch manufact- 

 rere as PuHinan" Palace Car Co., 

 lason &. Hamlin Organ and Plana 





: fha 



ufactured solely by the 



RUSSIA CEMENT CO. 



GLOUCESTER, MASS. 



Send 10c. and dealers' card who 



doesn't keep it in stock, for sample. 



