SCIENCE. in 



CLUB RATES. 



Analyst 



Appleton's Monthly 



American Naturalist 



Americ \n Journal of Science 



American Journal of Microscopy 



American Machinist 



American Monthly Microscopical Journal 

 American Manufacturer and Iron World- 

 Boston Journal of Chemistry 



Chicago Medical Review 



Chicago Field. 



Druggist 



Druggists' Circular 



Educational Monthly (Barnes ) 



Engineering News 



Engineering and Mining Journal. 



Education 



Engineering Magazine 



Harper's Magazine 



Harpers Weekly 



Harper's Bazar 



Harper's Young People 



Humboldt Library 



International Review 



Subscn p* 



With 



tion. 



SCiENCE 



— 



$2.00 



$5-5° 



3.00 



6.26 



4.00 



7.20 



6.00 



8.50 



1. 00 • 



4.70 



3.00 



6.70 



1. 00 



4.80 



4-25 



7.00 



1. 00 



4-75 



2.00 



5-5° 



4.00 



7.0° 



1.60 



5-*5 



1.50 



5-2S 



1.50 



5.20 



3.00 



6.25 



4.00 



7.00 



4.00 



7.00 



5.00 



8.25 



4.00 



7.00 



4.00 



7.20 



4.00 



7.20 



1.50 



5.20 



3.00 



6.25 



5.00 



8.00 



Iron 



Journal of the Telegraph 



London Lancet 



Magazine of American History 



Mining and Scientific Press 



Nature 



N. Y. Medical Journal 



New England Journal of Education 



North American Review 



Operator _ 



Popular Science Monthly 



Sanitary Engineer 



Prac:ical American 



Pacific Rural Press 



Scribner's Monthly 



Science Observer 



Scientific American 



" Supplement 



" with Supplement 



Southern Medical Record _ 



Student 



St. Nicholas 



Young Scientist 



Subscrip 

 tion. 



750 



9-34 



2.00 



5-5° 



5.00 



7-5° 



5.00 



8.00 



4.00 



6.40 



6.00 



9-'5 



4.00 



7.00 



3.00 



6.40 



5.00 



7.75 



1. 00 



4.80 



5.00 



8.00 



3.00 



6.50 



'•5° 



5.00 



4.00 



7.00 



4.00 



7.20 



.50 



4.40 



3.20 



6.56 



5.00 



8.00 



7.00 



9.60 



2. 00 



5-4° 



x 00 



4-75 



3.00 



6.40 



.50 



4.30 



With 

 Science 



International Scientists' Directory. 



THE INTERNATIONAL SCIENTISTS' DIRECTORY for 

 1881-2, contains the names and addresses of from 15,000 to 20,000 

 Scientific men and amateurs in all parts of the world, together with 

 their special branches of Science, and other items of interest relating 

 to collections, duplicates, desiderata, etc. of each. 



This is the first work of its kind ever attempted, and it will be 

 found of great value to all who are interested in any department of 

 Science. Price, in paper, $2.00. In cloth, $2.50. Sent post-paid 

 on receipt of price. S. E. CASSINO, Publisher, 



32 Hawley Street. Boston, Mass. 



SCIENCE 



A WEEKLY JOURNAL OF SCIENTIFIC PROGRESS. 



Vol. 11, No. 78, 



December 24, 1 88 1 . 



CONTENTS. 



The Polar Expedition (Edit.) ; Fossil Organisms in Meteorites (Edit.); Report of the 

 American Chemical Society; Proceedings of the New York Academy of Sciences, 

 December 5, 1881 ; The Scientific Societies of Washington ; Diagrammatic Repre- 

 sentation of Stereoscopic Phenomena, by W. Le Conte Stevens ; Foreign Notes on 

 the Source of Comets' Light; Loudnesses. Intensity of Sound, by George H . Stone ; 

 Letters from Commander Cheyne, George W. Rachel, M.D., and E. E. Barnard ; 

 Musical Fences: Notes From Foreign Exchanges ; D.-. D.aper's Mitioro'.OTica 1 

 Report; Minor Notes, &c, &c. 



BUY THE BEST 



POST & CO'S 



AMERICAN STUDENT LAMP. 



GUARANTEED THE BEST. 



POST & CO., M'F'RS & PATENTEES, CINCINNATI, OHIO. 



Nickel Plated Double Lamps $1 0,00 each. 

 Nickel Plated Single Lamps $5.00 each. 



SENT C. 0. D. ANYWHERE. 



Send for Illustrated Catalogue. 



POST & CO, Cincinnati, Ohio. 



