SCIENCE. 



[Vol. XIV. No. 2>^y 



Sprague £lectric Rail\iray and Motor Company. 



,f '"' '^'^J| Bearings Self Oiling. 



NON-SPARKING IN OPERATION. 



Lightest Weight Consistent with 

 Highest Efflciency. 



SIMPLE IN CONSTRUCTION. 



Not Liable to get out of Order, 



Commutator Wear Reduced 

 to a Minimum. 



i6 and i8 BROAD STREET, NEW YORK. 



Use 

 Without 

 Soap. 



to Pa''f'V;^Vater 



It is better tha!,'"''/i,vj'/-''''«\>, '' 

 finer, more effecti\ e. i-..,''*-') /,''^_-''/„^ 

 for the money, and in the-..*' 

 powder for your convenience 



"■'SJ, 



- . , it were, the fabric in one hand, the dirt in the other, 

 and lays them apart— comparatively^^king, washing with little work. As it saves the worst 

 of the work, so it sa\es the worst of the wear. It isn't the use of clothes that makes them old 

 before their time ; it is rubbing and straining, getting the dirt out by main strength. For scrub- 

 bing, house-cleaning, washing dishes, windows and glassware, Pearline has no equal. Beware 

 of imitations, prize packages and peddlers. Pearlme Is sold by all grocers. 138 James Pyle, New York. 



EAELE & CO. 



SUCCESSORS ao 



B. & J. BECK, 



U)16_.Chestnut Street, Phila, 



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. 

 591 Broadway, N.Y. 



Manufacturers and Importers of 

 PHOTOGRAPHIC INSTRUMENTS, 

 ] Apparatus and Supplies of every 

 description. Sole proprietors of 

 \ the Patent Detective, Fairy Nov- 

 el, and Bicycle Cameras, and the 

 I Celebrated Stanley Dry Plates. 

 Amateur Outfits in great variety, from $g.oo upward. 

 Send for Catalogue or call and examine. ^"More 

 than 40 years established in this line of business. 



OUR 75 CENT COLORED SILK. 



We have had unusual success 

 with this line of Oros Grains- 



'They are 19 1-2 inches wide, have 

 a fine cord weave, and are in 40 

 different, excellent shades, tinder 

 ordinary circumstances they w ould 

 sell for $1 per yard. 



Send for samples ; they will^surely 

 please you. 



JAMES McCREERY & CO. 



BROADWAY AND ELEVENTH STREET, 



NEW YORK. 



PATENT Ift" ■■■■ ■ 



Patent Pxb t Can ^ 



CCil IN THE WORLD. l(S\ 



l^GOLDMEDAL^ 



Used bj' thousands of first-class 

 s and by such maaufact- 



Repalrs Everything. 



Ila success has brought a lot of 



3 Liquid 

 ifactured solely by the 



RUSSIA CEMENT CO. 



GLOUCESTER, MASS. 



Send 10c. and dealers' card who 



doesn't keep it in fltock, for sample. 



FOOD 

 ADULTERATION 



And its Detection. With photomicrographic plates and 

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

 pages, 8vo, cloth. Price, $3.50. Circulars and Catalogues 

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



12 Cortlandt St., New York. 



