March 22, 1889.] 



SCIENCE. 



C. & C. ELECTRIC MOTOR COMPANY. 



Electric Motors 



FOR 



Arc and ncandescent 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, 139-141 Adams Street 

 Chicago. 



Southern Office, 25 Carondelet Street, 

 New Orleans. 



Established 1859. 



H. A. DREW, 



Commercial Printer, 



5 Clinton Place, near Broadway, 

 New York. 



Wedding Orders, Souvenirs, Invitations, Or- 

 ders of Dance, etc., etc., done in the latest and 

 most elaborate styles, at reasonable prices. 



All Favors promptly attended to. 



THREE 



Htindred ThouBand new enbscrtberB for Tbe Fomll; 

 JoTtmal and Ladies' Companion wanted. It 1b the 

 mqet Interaatinp and instructive paper ever Issned 

 BaDBorlbarB will receive during the coming twelve 



MONTHS 



Qovels written by American Authora, complete In 

 each three mimbers. The story of popular works of 

 fiction will be retold by a novel reader, the most In- 

 teresting and unique feature ever introduced in any 

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 read by the buaieBt people. We have engagred 



FOR 



thli work a widely known and popuiar writer. Com- 

 ments on Current Events, FasmofiSiNew and Origi- 

 nal Ideas and DeslgiiB for Ladies' Fancy Work and 

 Household Decoration, Letters from Correspondents 

 and their Answers. The coUeg-es and seminarieB of 

 the United States will be treated one each month in 

 an Illustrated article, showing the particular ad- 

 vantage of each, cost ©r attendance, etc. Invaluable 

 to parents having Bon» or daughters whom they de- 

 sire should receive the advantages of a higher edu- 

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 Fainting and Drawing, giving home instruction by a 

 well-known artist. A trial subscription of this ele- 

 ^|Ut paper will be sent to any address, three months, 



TEN CENTS. 



Liberal pay for literary work adapted to our col- 

 mmie. and for new and ori^nal drawings, designs 

 and ideas on any subject which we can use. 



Premium List the most complete in the world. We 

 offer inducements to club raisers and agents ap- 

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 post paid to any one sending us two yearly Bub- 

 soribers at 50 cents each is alone worth 76 cents. 



(©'"Sent to any address, postpaid one year, 50 

 cental six months, 25 cents, and a three months* 

 trial subscription for only lO cents. 



TRY IT! TRY IT! TRY IT! 



■ad you will become a permanent reader. AddreaB i 



John L. Douglass, Publisher, 

 322 Broadway. N. Y. 



GOOD NEWS 

 TO LADIES. 



Greatest moucement^ver of- 

 fered. Jsow's your time to get 

 up orders for our celebrated 

 Teas and Coffees, and secure 

 a beautiful Gold Band or Moss 

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 r Webster's riictlonary. Forfull particularsaddress 

 THE GREAT AMERICAIV TEA <:0., 

 """ 31 and 33 Vesey St., New Tork. 



Scientific Apparatus. 



J. GRUNOW 



631 Sixth Avenue, N 



Established 1852 



Microscope Stands, 

 Oil Immersion Object- 

 ives and Abbe Con- 

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 and Histological work, 

 of Objectives, Camera 

 Lucida and other 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 Beekman Street, New York. 



p. O. Box 289. 



MAGIC Stereopticons and the Best Views 



T /I ■KT-T-imiiTC- f""' Public, Church, Home, and 

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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 Dynaitios and Motors Deter- 

 mined. 



Insulation of Cables and Wires Tested. 



Etc., Etc. 



Circulars describing IMethods Used, Prices, 

 Etc., sent on Application. 



Address as above. 



W. H. WALISLEY & CO. 



SUCCESSORS TO 



K. & J. BECK, 



1016 Chestnut Street Phiia 



Microscopes and all 

 Accessories and Ap- 

 paratus. Photograph- 

 ic and Photo-Micro- 

 graphic Apparatus and 

 Outfits. 



Spectacles, Eye 

 Glasses, Opera and 

 Marine Glasses, etc. 



Illustrated Price List 

 mailed free to any ad- 

 dress. Mention Science 

 in corresponding with us. 



E. & H. T. ANTHONY & CO. 

 5gi 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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Amateur Outfits in great variety, from $9.00 u pwa rd. 



Send for Catalogue or call and examine. ^^"More 



an 40 years established in this line of bu 



WHITALL'S PLANISPHERES OR DI- 

 RECTORY OF THE STARRY HEAVENS 

 name and locate all Stars, Constellations, and 

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 Should be used by every one. Ask your sta- 

 tioner, or address Wm. T. Cooper, Manager, 

 307 Race St., Philadelphia, Pa. 



SCHOOLS AND COLLEGES 

 I positive advantage by ordering their furniture 

 and supplies from C. PARDO & CO., 



31 East 17th St., New York. 



TO EMPLOYERS. 



Having purchased the fixtures, good will, &c., of 

 the NEW YORK EMPLOYMENT BUREAU, at No. 

 681 BROADWAY, in this city, we request the pat- 

 ronage of the public in the future. We desire to 

 fill a long-felt want for an employment bureau, 

 where only the best grade of male help is dealt in, 

 and it Is our aim to send ONLY such help as is or- 

 dered in every instance, and our patrons can rely 

 on us to send strictly first-class help, the references 

 of whom we personally Investigate before sending 

 to any one. We simply request a trial, and are con- 

 vinced that we will give saiisf action In every case. 

 We have on hand help in every branch, which we 

 can send upo n re ceipt of telegram or letter, AND 

 FOR WHIijH we make NO CHARGE TO AN EM- 

 PLOYER. 



NEW YORK EMPLOYMENT BUREAU, 



(AS EEOEGANIZKD). 



