SCIENCE. 



[Vol. XIV. No. 336 



Spragne Electric Railway and Motor Company. 



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. 



16 and 18 BROAD STREET, NEW YORK. 



IDEAL FELT TOOTH POLISHER. 



HE SHRIEKS! 



Go it. Old Fellow, 

 scratcli, scrape,tear, 

 swear. Grope a- 

 roand after tliat 

 loose bristle stick- 

 ing in your gaok, and 

 TPonder wliy in tlie 

 world yonr teetli 

 look so blade when 

 yon brnsb tliexu 

 regularly. Listen to 

 your fair neighbor 

 and learn a thing 

 or two. 



SHE SPEAKS. 



'* I really don't see 

 boTP 1 lived vritHont 

 the Ideal Felt Tooth 

 Polisher. It is de. 

 lightfally pleasant 

 to use and howclean 

 andsmooth my teeth 

 feel and ho-*v they 

 shine. HoTV ruddy 

 and healthy my 

 gums look, and only 

 thinb:, at first it felt 

 so strange 1 did not 

 like it.'*^ 



170 LOOSE BHISTLES. 



Its Economy: Bolder Ktooe, 



Polishers onlr ■■<^ed bo i 



m 2Lss,Dim auus. 



> Celluloid, 



. CO., Utica, 



A YOUNG MAN can have lucralive engage- 

 ment, not only a fixed salary, but accord- 

 ing to his work accomplished In travelling for 

 Science. A personal interview invited. 

 ^ N. D. C. HODGES, 



47 Lafayette Place, New- York. 



Its superior excellence proven In millions of homes 

 for more tlian a quarter of a century. It is used by 

 the United States Govi rnment. Endorsed by tlie 

 heads of the Great Universities as the Strongest, 

 Purest, and most Healthful. Dr. Price's Cream 

 Baking Powder does not contain Ammonia, Lime, 

 or Alum. Sold only in Cans. 



PRICE BAKING POWDER CO. 

 KEW YOKE. CHICAGO. ST. LOUIS. SAN FBANCI8C0. 



AGASSIZ ASSOCIATION 



COURSE OF MINERALOGY. 



Expense for Pamphlet, Collection, Correspond- 

 ence (1st Grade), One Dollar; Postage, 25 cents. 



G. GUTTENBERG, Erie, Pa. 



No Chemicals. 



W. Baker & Co.'s 



Breakfast 



Is AbSOlUIbi 



^ocoa 



Pure, 



it is 



; the solubility of the powdered cocoa, vari- 

 ous expedients are employed, most of them being based 

 upon the action of some alkali, potash, soda or even am- 

 monia. Cocoa which has been prepared by one of these 



chemical processes, can usually be recognized at once by 



the distinct alkaline 



of the infusi 





W. Baiter & Co.'s Breaitfast Cocoa 



is manufactured from the first stage to the last by per- 

 fect mechanical processes, no ebemical beiuff 

 need in its preparation. By one of the most 

 ingenious of these mechanical processes the greatest de- 

 gree of fineness is secured without the sacrifice of the 

 attractive and beautiful red color which is characteristic 

 of an absolutely pure and natural cocoa. 



W. Bal(er & Co., Dorcliester, Mass. 



Patent p. tketC: 



\ IN THE WORLD. trSi 



'fiOlDMEDAL^ 



Used by thousands of first-class 

 :hBiitc9 and bv Euch manufact- 

 •3 as Pullman' Paiace Car Co., 



Mason & Hamlin Organ and Pian» 



Co., &c., &c. 



Repairs Everything. 



ItsBuccess has bronght a lot of 

 Itnitatora copying us in every way 

 Remember that THE 

 UINELePa^e'3 Liquid 

 Glue is manufactured eoTely by the 



RUSSIA CEMENT CO. 



GLOUCESTER, MASS. 

 Send 10c. and dealers' card who 

 loesn't keep it in stock, for sample. 



FOOD 

 ADULTERATION 



And its Detection. With photomicrographic plates and 

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

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

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



12 Cortlandt St., New York. 



The V erdict 



OF ALL who liave used Ayer's PiUs 

 for Biliousness and Liver Com- 

 plaint is that they are the best ever 

 made. Being free from any mineral 

 ingredients, and sugar-coated, Ayer's 

 Fills are adapted to all ages, constitu- 

 tions, and climates. 



"Having used Ayer's Pills for many 

 years in my practice and family, I feel 

 justified in recommending them as an 

 excellent cathartic and liver medicine. 

 They sustain all the claims made for 

 them."-W. A. Westfall, M. D., V. P. 

 Austin & N. W. R. R. Co., Burnet,Texas. 



"Ayer's Pills keep my stomach and 

 liver in perfect condition. Five years 

 ago I was afHicted with enlargement ot 

 the liver and with a severe form of dys- 

 pepsia, most of the time being unable ta 

 retain any solid food on my stomach. I 

 finally began to take Ayer's PiUs, anil 

 after using only three boxes of these 

 magical pellets, was a well man." — 

 Lucius Alexander, Marblehead, Mass. 



If you have Sick Headache, Constipa- 

 tion, Indigestion, or Piles, try 



Ayer's Pills, 



PEEPARED BY 



Dr. J. C. Ayer St. Co., Lowell, Mass. 



Bold by all Druggists and Dealers in Medicine 



