SCIENCE. 



m 



Electrical Batteries for Medical Purposes. 



J HE 'Vy'jElgTEFJN J^LECTF(IC ^ANUFACTUFfljNQ £o. 



CHICAGO, 



NEW YORK, 



Manufacturers of and Dealers in 



STATIONARY GALVANIC BATTERIES, PORTABLE HIGH 

 ELECTROMOTIVE FORCE BATTERIES, CHLORID 

 OF SILVER BATTERIES, GALVANO-CAUTE 

 BATTERIES, FARADAIC BATTERIES, POCKET 

 BATTERIES, BATH APPARATUS, AND 

 ELECTRODES. 



Dr. Butler's Plumbago Rheostat, 



PLIABLE SPONGE ELECTRODES, &c, &c. 



EDISON'S 



' R Y .^^^ 



Electric Pen & Duplicating Press, 



An Extremely jJseful Invention 



FOR 



DUPLICATING WRITTEN OR PRINTED MATTER. 



CATALOGUES ON APPLICATION. 



Address all Orders to 



Western Electric Man'fg Co. 



38 JJnion Square, 

 — NEW YORK — 



CITY. ^ 



8,000 Copies from a Single Writing, at the Rate of 400 an Hour. 



Ii is successfully used by Schools, Colleges, Banks, Commission House's, Mercantile Firms, Lawyers, 

 inisters, 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 



Pat. Nov. 16, 1869, Oct. 15, 1878. 



Patent Pending. 



No. 



The Latest Improvement 



consists in placing the filtering material 

 in a separate vessel or crock. The ad- 

 vantage being ;his, 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- 

 n end parties at a distance (instead of at- 

 tempting to get the Filter re-packed) that 

 g they should purchase a new filter crock, 

 ^H|^g the cost of which is moderate, and no 

 more than the cost of repacking. 



ORNAMENTAL STYLE. 



lo. 71, Porcelain Reservoir, 4 J^ quarts $7.25 each. 



„ ? 2 ' ," T/i " 9.25 " 



73i 11 ' - - 11.00 " 



74. 16 l ... 13.00 " 



75> 26 *' 15.50 " 



The Original and Genuine, 



ALL OTHERS ARE IMITATIONS. 



Over 1 00,000 now in use, 



Acknowledged the only complete Filter 

 ,nd Cooler in the world. 



JEW ETT ' S 



PORTABLE CROCK 



FILT E R 



WITH PORCELAIN-LINED 



COOLEPt. 



This is the only Filter linving the Pat- 

 ert 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. 



No. 61, Porcelain Reservoir, 4^ quirts. 

 " ° 2 - " "■ '' 7>2 



' 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 sic years. 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. 37, 1877. 



WF.iin & Bsveriqge:— I am just in receipt of your favor of yesterday, requesting my opinion of the "Jewett Filter" purchased of you sev- 

 eral months ago fi.r my personal use, anu 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 certainlv not excelled by any mechanical arrangement known to me. The foregoing remarks apply EQUALLY 

 to the large Filter of the same make purchased for the Eoard of 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 KINO, BRIGGS & CO., 596 Broadway. J. H. BALDWIN & CO., 21 Murray Street. L. HF.YNIGER, 

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





