SCIENCE. 



in 



Electrical Batteries for Medical Purposes. 



CHICAGO, 



NEW YORK, 



Manufacturers of and Dealers in 



STATIONARY GALVANIC BATTERIES, PORTABLE HIGH 

 ELECTROMOTIVE FORCE BATTERIES, CHLORIDE 

 OF SILVER BATTERIES, GALVANO-CAUTERY 

 BATTERIES, FARADAIC BATTERIES, POCKET 

 BATTERIES, BATH APPARATUS, AND 

 ELECTRODES. 



EDISON'S 



Electric Pen & Duplicating Press, 



^n pxtremely jJseful Jnyention 



Dr. Butler's Plumbago Rheostat, 



PLIABLE SPONGE ELECTRODES, &c. &c. 



DUPLICATING WRITTEN OR PRINTED MATTER. 



CATALOGUES ON APPLICATION. 



8,000 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. ^- 



It is successfully used by Schools, Colleges, Banks, Commission Houses, Mercantile Firms, Lawyers, 

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



10,000 fens now in jJse and tfye pemand £teadily jncreasing ! 

 No. 1, $25.00; No. 2, $30.00 ; No. 3, $35.00. 



Full Description and Samples of Work sent on Application. 



EDISON'S ELECTRIC PEN AND PRESS, 



38 Union Square, New York City. 



JEWETT'S 



Portable Crock Filter. 



HK. Nov. 16, ISM, Oct. 15, 1S7S. 



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 cf at- 

 tempting to get the Filter re-packed) that 

 they should purchase a new filter crork, 

 the cost of which is moderate, and no 

 more than the cost of repacking. 



ORNAMENTAL STYLE. 



No. 71, Porcelain Reservoir, 4^ quarts. 



$7.25 each. 



72. 7 l A " 9-2S " 



73. 11 11.00 " 



74. " " 16 " 13.00 " 



75i " " 26 " 1550 " 



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 sW years. 



The Original and Genuine. 



ALL OTHERS ARE IMITATIONS. 



Over 1 00,000 now in use. 



Acknowledged the only complete Filter 

 \nA Cooler in the world. 



"""'- Mf,lM< 



JEW ETT' S 



PORTABLE CROCK 



FILT E R 



WITH PORCELAIN-LINED 



COOLER. 



This is the only Filter h»ving the Pat- 

 er t Removable Filtering Cup attached, 

 which holds all sediment that would oth- 

 erwise pass i.:to the filter. 



This celebrated F.lter will take river, 

 lake, pond, rain or other impure water, 

 and render the same of 



Sparkling Transparency 



and Purity. 



STAINED OAK. 



o. 61, Porcelain Reservoir, 4^ quarts 



' 62. " 7)4 



' 63, " 11 " 



1 64, 16 " 



65, " " 26 " 



$6.75 each. 

 8.75 " 

 10.50 K 

 12.50 " 

 15.00 " 



Our sales 



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



BOARD OF HEALTH, Washington, D. C.,Aug. 97, 1877. 

 WEBB & BeVERIDGB:— I am j.ist 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 h;is fully answered your expressed eslimate of its value. As a cleanser and 

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



TO THE LARGR FlLTER OP THE SAMS MAKE PURCHASED FOR THE BoARD OP HkaLTH. 



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



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



For Sale in New York City uy KIMi. BRIGGS & CO., sq6 Broadway. J. II. BALDWIN & CO., 21 Murray Street. L. HEYNIGER 



18 Fulton Street. CHARLES JONES, 020 Broadway. LEWIS & CONGER, 601 Sixth Avenue. 



