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Can be used with any make arc dynamo. 



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Invaluable to lighting companies as a means by which 

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Address 



THE BROWN ELECTRIC COMPANY, 



400 Wood Street, Pittsburgh, Pa. 



Straight Cut Cigarettes. 



People of refined taste who desire 

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WM. S. KIMBALL & CO. 



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GERMAN SIMPLIFIED. 



An eminently practical new method for learning the German lan- 

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UNIVERSITY OF GEORGIA. 



The chair of "NATURAL HISTORY AND 

 AGRICULTURE" in the UNIVERSITY OF 

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All applications must be sent to 



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Athens, Georgia. 



SCIENCE. 



AN ILLUSTRATED WEEKLY JOURNAL. THE SCIENCE 

 COMPANY, OWNERS AND PUBLISHERS. 



Officers and Directors.— D. C. Gilman, of Baltimore, President; 

 Simon Newcomb, of Washington, Vice-President; Gardiner G. Hub- 

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 Marsh, of New Haven • J. W. Powell, of Washington ; W. P. Trow- 

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SCIENCE appears every Friday. Volumes begin in July and January. 

 Communications will be welcomed from any quarter. Rejected manu- 

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 postage accompanies the manuscript. 



Address all correspondence about contents of paper to 

 " Editor of Science," 



47 Lafayette Place, 



New York. 



Subscriptions. — In United States and Canada, $5 a year. 



In Great Britain and Europe, $6 a year. 

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Rumford Chemical Works, Providence, R. I. 



PRIZES OFFERED BY THE BOSTON 

 SOCIETY OF NATURAL HISTORY. 



THE WLKER PRIZES, APRIL, 1886. 



The Society offers a first prize of from $60 to $100, and 

 a second prize of $50, for the best memoirs in English, on the 

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" Original unpublished investigations on the embryology of 

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The essays are to be sent to the Secretary of the Society, 

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Boston, Mass. EDWARD BURGESS, Secretary. 



Kn^red at the Post-office in New York as second-class mail matter. Copyright, 1886, by The Science Company. 



