SCIENCE. 



iil 



Electrical Batteries for Medical Purposes. 



CHICAGO, 



NEW YORK, 



Manufacturers of and Dealers in 



STATIONARY GALVANIC BATTERIES, PORTABLE HI 

 ELECTROMOTIVE FORCE BATTERIES, CHLORID 

 OF SILVER BATTERIES, GALVANO-CAUTERY 

 BATTERIES, FARADAIC BATTERIES, POCKET 

 BATTERIES, BATH APPARATUS, AN 

 ELECTRODES. 



EDISON'S 



Electric Pen & Duplicating Press, 



fin pxtremely JJseful Jnvention 



Dr. Butler's Plumbago Rheostat, 



PLIABLE SPONGE ELECTRODES, &c, 4c. 



DUPLICATING WRITTEN OR PRINTED MATTER. 



CATALOGUES ON APPLICATION. 



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



A ddress all Orders to 



Western Electric Man'fg Co. 



38 Union Square, 

 — NEW YORK — 

 CITY. J ^ r 



li is successfully used by Schools, Colleges, Kanks, Commission Houses, Mercantile Firms, 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 £teadily Increasing ! 

 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. 



Pal. Nov. 16, 1S69, Oct. 15, IS78. 



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. 



ORXAMKNTAI, STVI.E. 

 No. 71, Porcelain Reservoir, 4 # quarts 



57.25 each. 



Yt ' 9-25 " 



11.00 " 



" 13-00 " 



" 15-50 " 



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 sk years. 



72, 



lv 



7 



71. 





11 



74. 



u 



16 



75. 



tfc 



" 26 



The Original and Genuine. 



ALL OTHERS ARE IMITATIONS. 



Over 100,000 now in use. 



Acknowledged the only complete Filter 

 ind Cooler in the world. 



'Hu, 



mam 



JEW ETT' S 



PORTABLE CROCK 



FILT ER 



WITH PORCELAIN-LINED 



COOLER. 



This is the only Filter h»ving 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. 



No. 6i, Porcelain Reservoir, 4^ quarts. 

 " 62. " ' 7 % » . 



'63, 11 " . 



" 64, " 16 " 



" 65, " " 26 " - 



$6.75 each. 

 8.75 " 

 10.50 

 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. 



to . BOARD OF HEALTH, Washington, D. C. s Ai,g. §7. 1877. 



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

 eral months ago for 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 certainlv not excelled by any mechanical arrangement known to me. The foregoing remarks apply equally 

 to the large Filter ok the same make purchased for the Board 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 KING, BRIGGS & CO.. 596 Broadway. J. H. BALDWIN & CO., 21 Murray Street. L. HEYNIGER, 

 18 Fulton Street. CHARLES JONES, 920 Broadway. LEWIS & CONGER, 6oi Sixth Aven«e. 



