SCIENCE. 



[Vol. XV. No. 370 



Sprague Blectric Railway and Motor Company. 



Bearings Self Oiling. 

 NON-SPARKING IN OPERATION. 



Lightest Weight Consistent with 

 Highest Efficiency. 



SIIVIPLE IN CONSTRUCTION. 



Not Liable to get out of Order. 



Commutator Wear Reduced 

 to a Minimum. 



16 and 18 BROAD STREET, NEW YORK. 



C ALICRAPH 



GREATEST SPEED! 



BEST FOR MANIFOLDING. 



100,000 Daily users. 



THE MOST DURABLE. 

 PRICE. - EIGHTY-FIVE DOLLARS. 



For account of speed contests and 

 Circulars, address, 



THE AMERICAN WRITING MACHINE GO. 



HARTFORD, CONN. 



BRANCH OFFICES:-23T Broadway, New York. 



14 West 4th Street, Cincinnati, O. 



1003 Arch Street. Philadelphia. 



Silk Stripe Tennis Suitings, 

 PRINTED AND STRIPED FLANNELS. 



Silk Mixture Pajama Stuffs, 

 WHITE AND COLORED DIMITIES. 



Plain and Embroidered Piqnes. 



Hemstitched & Fancy Lawns. 



white1}oods. 



Lawns, Nainsooks, Mulls, 

 LONG CLOTHS. 



3c)'cocidwau. C& l^rf <5t. 



NEW YOBK. 



HEATEHT AND HELL,. By Eman- 

 uel SwEDENBOEG. 416 pages, paper cover. 

 Mailed pre-paid for 14 Cents in stamps by 

 the American Swedeuborg Printing and Pub- 

 lishing Society, 20 Cooper Union, N. Y. City. 



THE 

 EQUITABLE LIFE 



ASSURANCE SOCIETY 

 OF THE UNITED STATES. 



January i, i8go. 



ASSETS, - - - $107,150,309 

 LIABILITIES, \%, - 84,329,235 



SURPLUS, - - $22,821,074 



NEW ] 



A.SSURANCE I - $175,264,100 

 IN 1889, j 



OUTSTANDING ) ^^ ^ ^^ . 



ASSURANCE, ) $631,0x6,666 



INCOME IN 1889, $30,393,288 



H. B. HYDE, President. 

 James W. Alexander, Vice-Pres't 



THE HIGHEST AWARD OF A GOLD MEDAL 

 at the PARIS EXPOSITION was secured by the 



REMINGTON 



STANDARD TYPEWRITER 



which has been for FIFTEEN YEARS THE STANDARD, 



and Embraces the Latest and Highest Achievements of Inventive Skill. 



WYCKOFF, SEAMANS & BENEDICT, 327 BROADWAY, NEW YORK. 



CHANCE FOR ALL 



To Enjoy a Cup of Perfect 

 Tea. A TRIAL ORDER of ?H 



pourtds of Fine Tea, either Oolong. Ja- 

 pan, Imperial. Gunpowder, Young Hy- 

 son, Mixed. Knplish Breakfast, or Sun 

 Sun Chop, sent bv mail on rtceipt of 

 S2.00. Be partiiiularand statpwhat kind 

 of Tta you want. Greatest inducement 

 e\ er offered to get orders for our ecle- 

 Coffeea and Eauinpr Powder, For full particu- 



MINERALS. 



CaMnet Specimens and Collections. 



Our stock is very complete in fine specimens for 

 the connoisseur, as well as cheaper specimens for the 

 student and amateur. Complete Catalogue Free. 



GEO. L.. B!VGL,ISII & CO., 



Dealers in Minerals, 



1513 Chestnut Street, Philadelphia, Pa. 



If you have 1100, |1,000 or $1,000,000 

 for which you are seeking for a profitable 

 investment, write to jAilES W. Geeene, 

 West Superior, Wis. 



Inquiry costs nothing. Reference by per- 

 mission to The Editor of Science. 



bCN I O nSn I CU quick salK, SAMPLE FRK. A n 

 opportunity. Geo. A. Scott, 842 Broadway, N. ^ 



