SCIENCE. 



iii 



JEWETT'S 



Portable Crock Filter. 



/W. Xov. IG, 1S69, OH. 15, 1S78. 



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. 



ORNAMENTAL ST1XE. 



No. 71, Porcelain Reservoir, 4^ quarts - . $7.25 each. 



72 ' » " 754 



73. 



" 74, " 



75, " 



16 

 26 



0.25 

 11.00 

 13.00 

 15.50 



The Original and Genuine. 



ALL OTHERS ARE IMITATIONS. 



Over 100,000 now in use. 



Acknowledged the only complete Filter 

 \nd Cooler in the world. 



JEWETT'S 



POPTABLE CROCK 



FILTER 



WITH PORCELAIN- LI NED 



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.lter will take river, 

 lake, pond, rain or other impure water, 

 and render the same of 



Sparkling Transparency 



and Purity. 



STAINED OAK, 



$6.75 each. 



8.75 

 10. 50 



No. 61, Porcelain Reservoir, 4%" quarts 



" 62. " 7 « " 



" 63, " 11 " 



11 64, " " 16 



" 65, " " 26 " 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 si years. Our sales 

 111 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.^Avg. 37, 1877. 

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

 »ral months ago f< r my personal use, and am pleased to say that it h.ts fully answered your expressed estimate of its value. As a cleanser and 

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



'O THE LARGE F'lLTER OK THE SAMS 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. 



«ok Rale in New York City by KING. BRIGGS & CO., 506 Proadway. J. H. BALDWIN & CO., 21 Murray Street. L. HEYNIGER. 



i3 Fulto. Street. CHARLES JONES. 020 Broadwav. LEWIS & CONGER. 601 Sixth Aveni/e. 



URANIA. 



AN INTERNATIONAL JOURNAL OF ASTRONOMY. 



Under the above title we intend from January next to publish a Journal for astronomical research, for which 

 undertaking we are anxious to obtain your co-operation. 



What chiefly induces us to increase the number of scientific periodicals by a new one is the circumstance that 

 every year many astronomical papers and memoirs of great value are published in Transactions or Proceedings of 

 Learned Societies, and, in consequence, remain unknown to many astronomers. In publishing Urania it is our aim 

 to provide a receptacle for papers of this kind, which, we trust, will thereby become more generally known, and by 

 preparing reviews or abstracts of all papers of any importance published in places where they seem likely to be over- 

 looked, we shall endeavor to keep our readers as fully acquainted as possible with the progress of astronomical 

 research. At the same time observations or ephemerides of planets, comets, etc., will not be excluded, and in 

 addition to purely astronomical subjects, the essentially cosmical phenomena of magnetism as connected with 

 Aurorae will also meet with their share of attention. 



The journal will be printed in Dublin, and will be issued in numbers of from 16 to 24 pages each, demy 410, 

 whenever we have material enough for a number. Longer memoirs will not be cut up in several parts, but will be 

 printed together in one number, or carried through two numbers without interruption. Shorter numbers will be 

 issued whenever subjects of more immediate interest shall require it, and in particular ephemerides of comets, etc., 

 will be issued on advance sheets, if necessary.. Twelve numbers will contain 240 pages, and will form a volume. 



The numbers will be sent by post to all subscribers. The subscription for one volume, including postage to all 

 countries in the postal union, is Sixteen Shillings, payable in advance to the undersigned, J. L. E. Dreyer. Post 

 Office Orders to be made payable at the General Post Office, Dublin. Intending subscribers are requested to send 

 in their subscription as soon as possible, in order that the number of copies to be printed may be known at once. 

 No. I. will be published early in January. 



We have already secured the co-operation of eminent men of science both at home and abroad. Thus the two 

 first numbers will contain contributions from Lord Rosse, Lord Lindsay, Professor Klinkerfues, Professor Schjellerup, 

 Dr. R. S. Ball, Dr. BSrgen, and others. Papers written in French, German, or Italian will be printed in the original 

 language (German MSS. are requested to be written in Roman characters). 



RALPH COPELAND, J. L. E. DREYER, 



Obsematoty, Dunecht, Aberdeen. Observatory, Dunsink, Co. Dublin, 



