SCIENCE. 



[Vol. XIV. No. 350 



Sprague Electric Railway and Motor Company. 



Lightest Weight Consistent with 

 Highest Efficiency. 



SIIVIPLE IN CONSTRUCTION. 

 Not Liable to get out of Order. 



Bearings Self Oiling. 

 NON-SPARKING IN OPERATION. 



Commutator Wear Reduced 

 !o a Minimum. 



16 and 18 BROAD STREET, NEW YORK. 



SILKS. 



JAMES McCREERY & CO. are show- 

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 Reception, and Street Costumes, in Metal, 

 Silks and Velvets, the Richest and most 

 Beautiful Designs and Combinations pro- 

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In low and medium-priced Novelties, 

 ladies will experience no difficulty in find- 

 ing goods suited to the various uses to 

 vrhich Fancy Silks can be applied. 



Dress Silks in the latest Colorings and 

 the newest and most approved Weaves, 

 from 85 cents to $4.00 a yard 



Mail Orders receive most careful atten- 

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JAMES McCREEHY & CO. 



BROADWAY AND ELEVENTH STREET, 



NEW YOrJi."">'V 





LACES AND GAZES.-PoInt and Duchesse CoUare 

 and sets In Van Dyke effects. Bridal Veils in 

 Duchesse Point aLd Applique, wiih trimming laces 

 to match. Eeal Jace Bandkerchiefs, Ducbesse and 

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 flounces and all overs in choice evening shades. 

 Black Lace Drapery Nets, White and Colored, Plain 

 and Fancy Crepes and Crepe de Chine for evening 

 toilets. 



PARIS DRESSES AKD CLOAKS.-Costumes for 

 Evening, Dinner, Reception and Promenade, 

 Tea Gowns, Matinees, Suits, Wraps, Sacques, 

 Cloaks, Long Garments, Opera Wraps and Jacuets. 

 Also, those of our own manufacture, from Paris 

 styles, in the most fashionalle fabrics. 



T7URS AND FUR TRIMMINGS.-Sealsklu Sacques, 

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NEW YORK. 



E. & H. T. ANTHONY & CO. 

 5gi Broadway, N.Y. 



jramifacturers .inc 

 PHOTOGRAPHIC INSTRUMENTS, 



Apparatus and Supplies of every 

 description. Sole proprie.tors of 

 the Patent Detective, Fairy Nov- 

 el, and Bicycle Cameras, and the 

 Celebrated Stanley Dry Plates, 

 eat variety, from Sg.oo u pwa rd. 

 ir call and examine. 

 tablished in this line of businei 



FOOD 

 ADULTERATION 



And its Detection. With photomicrographic plates and 

 a bibliographical appendix. By J. P. Battershall 328 

 pages, 8vo, cloth. Price, S3. 50. Circulars an4 Catalogues 

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



12 Corllandt St., New \ ork 



Readers of Science 



Corresponduig with 07- visiting Advertisers 

 will con fer a great favor by mentioning the paper 



H'OUSEHOLD MICROSCOPE 



Sent to any address for $5.00 



This instrument is simply for 

 use by a beginner in Microscopy. 

 Tile finer Microscopes vary in 

 value from $25. to $250. Send 

 for catalogue to 



G. S. WOOLMAN, 



116 FULTON ST., 



Xew York. 



5S1IHE1 



tHi; 



mm 



fo\ IN THE WORLD. £51 



l^fiOLDMEDAL^ 



Repairs Everything. 



as brought a lot of 



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Clue s manufactured solely by the 



RUSSIA CEMENT CO. 



CTOLCESTER, MASS. 

 Send Ifc and dealers' card n-ho 

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EARLE k CO, 



SUCCESSORS 10 



R. & J. BECK, 



I CI 6 Chestnut Street, Phila, 



Microscopes and all 

 Accessories and Ap- 

 paratus. Photograph- 

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 graphic Apparatus and 

 Outfits. 



Spectacles, Eye 

 Glasses, Opera and 

 Marine Glasses, etc. 



Illustrated Price List 

 mailed free to any ad- 

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 in corresponding with us. 



J. GRUNOW 



631 Sixth Avenue, Ne 



Established 1852. 



Microscope Stands, 

 Oil Immersion Object- 

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 and Histological work, 

 of Objectives, Camera 

 Lucida and other ac- 

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IMPROVED OIL LIGHT 



MAGIC LANTERNS. 



Also Lime mid Electnc Li^hi Apparatus^ and 



mechanical, plain, and fine colored views. 



J. B. COLT & CO., Manufacturers, 



No. 16 Beekman Street, New York. 



MINERALS. 



International Mineral Cabinets, 

 specimens from Europe, Asia, 

 Africa, S. America, Mexico, 

 Greenland, Canada, and U.S. loo spec, §3.50 ; 50 spec, 

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 GEO. L. ENGLISH & CO , Dealers in Minerals, 



1512 Chestnut St., Philadelphia, Pa. 



