SCIENCE. 



Hi 



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, 



Dr. Butler's Plumbago Rheostat, 



EDISON'S 



Electric Pen & Duplicating Press, 



y^n jixtremely JJseful Jnvention 



UPLICATING WRITTEN OR PRINTED MATTER. 



PLIABLE SPONGE ELECTRODES, &c. &c. 



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 JJnion Square, 

 — NEW YORK 

 CITY. 



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

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



10,000 fens now in ]Jse and tfye Pemand jSteadily Jncreasing ! 



No. 3, $35.00, 



No. 1, $25.00 ; 



No. 2, $30.00 ; 



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 



Put. N,.v. IB, 1S«9, Oct. 15, 1*71. 



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, thertfore, recoTi- 

 rr.end parties at a distance (instead cf at- 

 tempting to get the F ilter re-packed) that 

 they should purchase a new filter crock, 

 the cost of which is moderate, and no 

 more than the cost of repacking. 



A T o. 



ORNAMENTAI, STYL,E. 



Porcelain Reservoir, 4^ quarts..* 



7 'A 



$7.25 each. 

 9-25 

 11.00 

 13.00 

 15.50 



The Original and Genuine. 



ALL OTHERS ARE IMITATIONS. 



Over 1 00,000 now in use. 



Acknowledged the only complete Filter 

 ind Cooler in the world. 



JEWETT'S 



POPTABLE 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 into the filter. 



This celebrated F.ltr r will take river, 

 lake, pond, rain or other impure water, 

 and render the same of 



Sparkling Transparency 



and Purity. 



STAINKD OAK* 



No. 61, Porcelain Reservoir, 4^ quartS- 

 " 62. " j% " . 



" 63, " 11 



" 64, " 16 " 



" 65, " " 26 " 



$6.75 each. 

 8-75 " 

 10.50 l 

 12.50 " 

 15.00 " 



READ THE TWO MOST CONVINCING TESTIMONIALS. 



Isaac S. Williams & Co., 72^ Market Street, Philadelphia, Pa. — We have sold your " Patent Water Filter" for the last sve years. Our sales 

 m 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.,Ang. 37, 1877. 

 WEBB & P.eveb:dG2: — I am just in receipt of your favor of yesterday, requesting my opinion of the 'Jewett Filter" purchased of you sev- 

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

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



"O THE LARGE FILTER OK THE SAME MAKE PURCHASED KOR THE BOARD OK HEALTH. 



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



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



•or Sale in New York City by KINO, BRIGGS & CO., 596 Broadway. J. H. BALDWIN & CO., 21 Murray Street. L. HEVNIGER, 

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



