April 26, 1889.] 



SCIENCE. 



C. & C. ELECTRIC MOTOR COMPANY. 



Electric Motors 



FOR 



Arc and Incandescent Cir- 

 cuits, Most Economi- 

 cal Motor on the 

 Market. 

 Regulation Perfect. 

 Motors Designed for all 

 Power Purposes. 



OFFICE and MANUFACTORY: 



402 and 404 Greenwich Street, New 

 York Citv. 



New England Office, 19 Pearl St., Boston. 



Philadelphia Office, 301 Arch St. 



Western Office, l39-r4l Adams Street 

 Chicago. 



Southern Office, 25 Carondelet Street, 

 New Orleans. 



OUR CENTENNIAL EXHIBIT. 



Many of those who regularly read 

 advertisements of our goods in 

 these columns, will he in INew York 

 city during Centennial Week. W e 

 hope to see them here in the store. 



For a tew days, immediately pre- 

 ceding and following the great 

 Military and Civic Parades, each 

 department in the house will make 

 a special decorative display of its 

 goods. 



Having, heyond question, one of 

 the largest and most varied assort- 

 ments ot High Novelty l>ress Fa- 

 brics to be found in America, we 

 expect to make this Exhibit mem- 

 orable, and in every way worthy of 

 the time in which it occurs. 



JAMES McCEEERY & CO. 



BROADWAY AND ELEVENTH STREET, 



NEW YORK. 



A TEMPORARY BINDER 



for Science is now ready, and will he mailed 



postpaid on receipt of price. 



Half Morocco - 75 cents. 



This binder is strong, durable and 

 elegant, has gilt side-title, and allows 

 the opening of the pages perfectly 

 ilat. Any number can be taken out 

 or replaced without disturbing the 

 others, and the papers are not muti- 

 lated for subi^equent permanent bind- 

 ing. Filed in this binder, Scietice is 

 always convenient for reference. 



N. D, C. HODGES, 



47 Lafayette Place, N. Y. 



Old and Rare Books. 



A. S. CLARK, Bookseller, 



34 PARK ROW, NEW YORK CITY. 



A Gleaner in the By-ways of Literature. Results of Gleaning 



found in Catalogues issued from time to time. 



CATALOGUE NO. 27 NOW READY. 



» ACK NUMBERS and complete sets of leading Mag- 

 ) azines. Rates la-ju. A.M. MAG. EXCHANGE, 

 Schoharie, N.Y. 



H. WILLIAMS, 

 Dealer in Old Magazines, Reviews, &c. Scientific 

 periodicals a specialty. 39 Macdougal St., N.Y. 



Scientific Apparatus. 



J. GRUNOW 



631 Sixtli Avenue, New York 



Established 1852. 



Microscope Stands, 

 Oil Immersion Object- 

 ives and Abbe Con- 

 densers for Bacterial 

 and Histological work, 

 of Objectives, Camera 

 Lucida and otiier ac- 

 cessory apparatus. 



IMPROVED OIL LIGHT 



MAGIC LANTERNS. 



Also Lime and Electric Light Apparatus, and 

 mechanical, plain, and fine colored views. 



J. B. COLT & CO., Manufacturers, 

 No. 16 Bfekman Street, New York. 



MAGIC Stereopticons and the Best Vie' 



I AM-T-tTDMC f" P"'^''^- Church, Home, a. 

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 Years' Practical E.xperience. lUus. Catalogue Free. 



GEO. H. PIERCE, 

 136 S. Eleventh St., Philadelphia, Pa. 



ELECTRICAL TESTING BUREAU, 



Johns Hopkins University, Baltimore, Md. 



Resistance Coils and Boxes Compared. 



Am meters and Volt meters calibrated. 



Condensers standardized. 



Primary and Secondary Batteries Tested. 



Efficiency of Dynamos and Motors Deter- 

 mined. 



Insulation of Cables and Wires Tested. 



Etc., Etc. 



Circulars describing Methods Used, Prices, 

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Address as above. 



MORRIS EAELE & CO, 



SUCCESSORS TO 



K. & J. BECK, 



ICI6 Chestnut Street Phila 



Microscopes and all 

 Accessories and Ap- 

 paratus. Photograph- 

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 jraphic Apparatus and 

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Spectacles, Eye 

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 Marine Glasses, etc. 



Illustrated I'rice List 

 mailed free to any ad- 

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 in corresponding with us. 



E. & H. T. ANTHONY & CO. 

 Sqi Broadway, N.Y. 



Manufacturers and Importers of 

 PHOTOGRAPHIC INSTRUMENTS, 

 Apparatus and Supplies of every 

 description. Sole proprietors of 

 the Patent Detective, Fairy, Nov 

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 great variety, from ^.00 upward. 

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 tablished in this line of business. 



ICOOD NEWS 

 112 LADJES. 



tjrealest moucem^^ever of- 

 fered. Xow'8 your time to get 

 up orders for our celebrated 

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 a beautiful Gold Band or JlosB 

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- e Toilet Set, Watch, Brass Lamp, 



or Webster's Dictionary. For full particulars address 

 „TIIE GREAT AMERKJAIV TE.4 «'0., 

 P. O. Box 389. 31 and S3 Vcsey St.. New \ ork 



R. ELLIS & CO. 



BUSINESS, HOTEL AND PATENT BROKERS, 

 ADCTIONEERS, ETC. 



Room 46. 



JVe^l} fork. 



Advised free 0/ charge. 



