SCIENCE. 



iii 



CLUB RATES. 



Analyst 



Appleton's Monthly 



American Naturalist 



American 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 



Subscrip' 

 tion. 



$2.00 

 3.00 

 4.00 

 6.00 

 1. 00 

 3.00 

 1. 00 

 4-25 

 1. 00 

 2.00 

 4.00 

 1.60 

 1.50 

 1.50 

 3.00 

 4.00 

 4.00 

 5.00 

 4.00 

 4.00 

 4.00 



i-5° 

 3.00 

 5.00 



With 

 Science. 



$5.50 

 6.26 

 7.20 

 8.50 

 4.70 

 6.70 

 4.80 

 7.00 



4- 7S 



5- 5° 

 7.0° 

 5-25 

 5-2S 

 5.20 

 6.25 

 7.00 

 7.00 

 8.25 

 7.00 

 7.20 

 7.20 

 5.20 

 6.2s 

 8.00 



Subscrip 

 tion. 



Iron - 



Journal of the Telegraph 



London Lancet - 



Magazine ol 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 



Practical American... 



Pacific Rural Press 



Scribner's Monthly 



Science Observer 



Scientific American.. 



" " Supplement 



" " with Supplement 



Southern Medical Record 



Student 



St. Nicholas 



Young Scientist 



With 

 Science. 



7-5° 



9-34 



2.00 



5-5° 



5.00 



7-5° 



5.00 



8.00 



4.00 



6.40 



6.00 



9-i5 



4.00 



7.00 



3.00 



6.40 



5.00 



7-7S 



1 .00 



4.80 



5.00 



8.00 



3.00 



6.50 



«.5° 



S.oo 



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° 



1.00 



4-75 



3.00 



6.40 



.50 



4-3° 



the value of the Illustrative Definitions in 



Webster's Unabridged Dictionary 



Dr. Scott's Electric Hair Brush. — A good hair brush cannot be bought for ~V+\ %-K pt r P \* g f^ j 



much less than the sum tor which Dr. Scott's electric brush can be secured: The following from Webster, page Hfi4, shows 

 This brush, aside from the curative properties claimed for it, is a well made arti- 

 cle, handsome in appearance and first-class in every respect. It is not a metallic 

 brush, but is made of pure bristles. Its electrical qualities are very strong, and 

 will manifest themselves by causing the needle of a magnetic compass to vibrate 

 even with a thick book on the top of a table intervening. Violent vibrations of 

 the needle can be caused by passing the brush quickly back and forth within 

 four or five inches of the compass. It is claimed for this brush that its use will 

 cure headaches and neuralgia, will remove dandruff, and in most cases will pre- 

 vent the hair from falling or turning gray. In support of this claim many testi- 

 monials from responsible persons are adduced. Evidently its use would be of 

 great benefit wherever electricity would prove beneficial, and could not in any 

 event result in harm. — Boston Jotmial, May 28, 1881. 



SCIENCE 



A WEEKLY JOURNAL OF SCIENTIFIC PROGRESS. 



Vol. II, No. 61, 



CONTENTS. 



August 27, 1 881 



The Cincinnati Mee'ingol the American Association for the Advancement of Science 

 (Edit.) ; Report on the Geology and Resources of the Black Hills of Dakota, by L. 

 P. Gratacap ; The Great Primordial Force, by Henry Raymond Rogers, M. D.; 

 The Tidal Evolution of the Moon ; Mr. Darwin on Dr. Hahn's Discovery of Fossil 

 Organisms in Meteorites ; An Afternoon on Passaic River ; Selenographical ; Books 

 Received ; " Sea Mosses;" Sun Spots (War Office Reports) ; Weekly Meteorologi- 

 cal Report, by Daniel Draper; Notes, &c. ( &c. 



Subscription, Four Dollars a Year. 



Single Numbers, Ten Cents, 



1, flying j ib; 2, jib; 3, fore-top-mast-stay sail; 

 4, fore-course; 5, foretop sail; 6, foretop-gallant 

 sail; 7, fore-royal ; 8, fore sky-sail; 9, fore-roy- 

 al studding sail; 10, foretop-gallant studding- 

 sail; 11, foretop-mast studding-sail; 13, main- 

 course; 13, maintopsail; 14, maintop-gallant 

 sail; 15, main-royal; 16, main sky-sail; 17, 

 main royal s'udding-sail ; 18, main top-gallant 

 studdmg-sail; 19, maintop-mast studding sail; 

 20, mizzen-course ; 21, mizzen-top sail; 22, 

 mizzen-top-gallant sail; 23, mizzen-royal; 24, 

 mizzen sky-sail; 25, mizzen-spanker. 



The pictures in Webster under the 12 words, 

 Beef, Boiler, Castle, Column, Eye, Horse, 

 Moldings, Phrenology, Ravelin, Ships, 

 (pages 1164 and 1219) Steam engine, Tim- 

 bers, define 343 words and terms far better 

 than they could be defined in words. 



New Edition of WEBSTER, has 

 118,000 Words, 3000 Engravings, 

 4600 New Words and Meanings, 



Biographical Dictionary 



of over 9700 Names. 



Published by G.&C. MERRIAM.Springfield.MaA 



