SCIENCE. 



in 



Electrical Batteries for Medical Purposes. 



CHICAGO, 



NEW YORK, 



Manufacturers of and Dealers in 



STATIONARY GALVANIC BATTERIES, PORTABLE HIG 

 ELECTROMOTIVE FORCE BATTERIES, CHLORIDE 

 OF SILVER BATTERIES, GALVANO-CAUTERY 

 BATTERIES, FARADAIC BATTERIES, POCKET 

 BATTERIES, BATH APPARATUS, AND 

 ELECTRODES. 



H 



EDISON'S 



Electric Pen & Duplicating Press, 



yin ^xtremely JJseful Jnvention 



Dr. Butler's Plumbago Rheostat, 



PLIABLE SPONGE ELECTRODES, &c. &c. 



DUPLICATING WRITTEN OR PRINTED MATTER. 



CATALOGUES ON APPLICATION. 



,000 Copies from a Single Writing, at the Rate of 400 an Hour. 



Address all Orders to 



Western Electric Man'fg Co. 



38 Union Square, 

 — NEW YORK 

 CITY. 



U is successfully used by Schools, Colleges, Banks, Commission Houses, Mercantile F'irms, Lawyers, 

 Ministers, Copyists, and every person or firm desiring a number of duplicates of any document. 



10,000 fens now in pse and tfye Pemand Readily Jncreasing ! 



No. 3, $35,00. 



No. 1, $25.00 ; 



No. 2, $30.00 ; 



Description and Samples of Work sent on Application. 



EDISON'S ELECTRIC PEN AND PRESS, 



38 Union Square, New York City. 



JEWETT'S 



Portable Crock Filtei 



rat. Nov. 16, ISM, Oct. 15, ISIS. 



Patent Pending. 



The Latest Improvement 



consists in placing the filtering material 

 in a separate vessel or crock. The ad- 

 vantage being this, viz ; 



That whenever the filter part gives 

 out, a new crock can be obtained, which 

 will make the whole complete as when 

 first purchased. We, therefore, recom- 

 mend parties at a distance (instead of at- 

 tempting to get the Filter re-packed) that 

 they should purchase a new filter crock, 

 the cost of which is moderate, and no 

 more than the cost of repacking. 



ORKADIENTAL STVI.E. 



No. 71, Porcelain Reservoir, 4^ quarts 



The Original and Genuine. 



ALL OTHERS ARE IMITATIONS. 



Over 100,000 now in use. 



Acknowledged the only complete Filter 

 ind Cooler in the world. 



JEW ETT ' S 



PORTABLE CROCK 



F ILT E R 



WITH PORCELAIN-LINED 



COOLER. 



This is the only Filter having the Pat- 

 ent Removable Filtering Cup attached, 

 which holds all sediment that would oth- 

 erwise pass into the filter. 



This celebrated Filter will take river, 

 lake, pond, rain or other impure water, 

 and render the same of 



Sparkling Transparency 



and Purity. 



STAINED OAK. 



72, 



7. 



73, 



II 



74, " 



16 



75, 



26 



$7.25 each. 

 9-25 ' 

 11.00 " 

 13.00 " 

 15.50 " 



No. 61, Porcelain Reservoir, 4% quarts. 

 " 62. " ' 7 % " . 



" 63, " 11 " 



" 64, " " 16 " . 



" 65, " 26 " - 



..»„ $6.75 each. 



.... 8. 7S » 



10.50 



12.50 " 



15.00 " 



READ THE TWO MOST CONVINCING TESTIMONIALS. 



Isaac S. Williams & Co., 728 Market Street, Philadelphia, Pa.— We have sold your "Patent Water Filter" for the last s« years. Our sales 

 in that time having reached upwards of five thousand, and in no instance have we heard ot any failure in performing all you claim for them. 



BOARD OF HEALTH, Washington, D. C.,Aug. 27, 1877. 

 WKisli & BeveridGE:— I am just in receipt of your favor of yesterday, requesting my opinion of the 'Jewett Filter" purchased of you sev- 

 eral months ago t-,r my personal use, and am pleased to say that it has fully answered your expressed estimate of its value. As a cleanser and 

 purifier of drinking water it is certainly not excelled by any mechanical arrangement known to me. The foregoing remarks apply equally 



TO THE LARI.E FILTER OF THE SAME MAKE PURCHASED KOK THE liuAKD OK HEALTH. 



Very respectfully yours, CHRIS. C. COX, M. D. 



Manufactured only by JOHN C. JEWETT & SONS, Buffalo, New York. 



For Sale in New York City by KING, BRIGGS & CO., S96 Broadway. J. H. BALDWIN & CO., 21 Murray Street. L. HEYNIGER 



18 Fulton Street. CHARLES JONES, 920 Broadway. LEWIS & CONGER, 601 Sixth Avenwe. 



