SCIENCE. 



iii 



JEWETT'S 



Portable Crock Filter 



No, 



r-it. Nov. 16, IS69, On. 15, IsW. 

 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, wh.ch 

 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 crock, 

 the cost of which is moderate, and no 

 more than the cost of repacking. 



ORNAMENTAI, ST1XE. 



71, Pore lam Reservoir, 4% quarts $7.25 each. 



7 2 , T A - <3- 2 5 ] 



73, " " 11 '" 11.00 ' 



74, " 16 " i2-°° 



7Si " 26 "' -- 15-5° " 



The Original and Genuine. 



ALL OTHERS ARE IMITATIONS. 



Over 1 00,000 now in use. 



Acknowledged the only complete Filler 

 >nd Cooler in the world. 



J E W ETT ' S 



HURTAIiLE CROCK 



F I LT 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. 



Th's celebrated F. Iter will take river, 

 J| lake, pond, rain or other impure water, 

 H. and render the same of 



Sparkling Transparency 



and Purity. 



STAINED OAK.. 



No. 61, Porcelain Reservoir, 4^ quarts $6-75 each. 



" 62. " ' 7 >2 " • 8.75 " 



" 63, " " 11 " -- io-S° ' 



" 64, " " 16 " -- 12-5° 



5 " -- 15-50 " ' " 65, '• " 26 " - '5-oo " 



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. 37, 1877. 



Webb & 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 !• r my personal use, and am pleased to say that it has fully answered your expressed estimate of its value. Asa cleanser and 

 purifier of drinking water it is certainlv not excelled by any mechanical arrangement known to me. The foregoing remarks ai'I-ly equally 



TO THE LARGE F'lLTER OF THE SAME MAKE PURCHASED FOR THE BOARD OF HEALTH. 



Very respectfully ycurs, 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., sa6 Broadway. J. H. BALDWIN & CO., 21 Murray Street. L. HEYNIGER, 



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



LIST OF THE WORKS SO FAR PUBLISHED IN 



The Humboldt Library 



oe 



POPULJlR SCIENCE: 



4- 



LIGHT SCIENCE FOR LEISURE HOURS. By 

 R. A. Proctor. 



FORMS OF WATER (Illustrated). By Prof. 

 John Tyndall. 



PHYSICS AND POLITICS. By Walter Bage- 

 hot. 



MAN'S PLACE IN NATURE (Illustrated). By 

 Prof. Thomas H. Huxley. 



EDUCATION: INTELLECTUAL, MORAL, 

 AND PHYSICAL. By Mr. Herbert Spencer. 



TOWN GEOLOGY. By the Rev. Chalres Kings- 



LEY. With Appendix by Prof. Huxley. 

 CONSERVATION OF ENERGY (Illustrated). 

 By Prof. Balfour Stewart. With an Appen- 

 dix by Prof. Alexander Bain. 



THE STUDY OF LANGUAGES. By C. Mar- 

 cel. (Ready July 17th). 



THE PRICE OF THE SEVERAL NUMBERS IS 15 CENTS. 



TERMS OF SUBSCRIPTION: 



One Copy, 



One x'ear (24 numbers). 4 Months (8 numbers). 



$3 . . $1. I Six Copies, 



One Year (24 numbers). 4 Months (8 numbers). 



$15 . . $5. 



The works published ir this series are the best of their kind, and are reproduced without abridgement. Bound in cloth, the same works cost 

 from % 1.25 to $2. 



1/ in any place in the United States it is not obtainable from local dealers, it may be ordered from the Publishers, who will send it to any 

 address for 15 cents per number, in postage stamps. 



J. FITZGERALD & CO., Publishers, 



No. 143 Fourth Avenue, New York. 



