SCIENCE. 



[Vol. XIX. No. 472 



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THE BOTANICAL GAZETTE. 



A monthly illustrated journal of botany in 



all its departments. 



25 cents a number, $2.50 a year. 



Address PUBLISHERS BOTANICAL GAZETTE, 



CraiTfordsTlIIe, Ind. 



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JSrOW READY. 



THE RADIOMETER. 



By DANIEL S. TROY. 



This contains a discussion of the reasons 

 for their action and of the phenomena pre- 

 sented in Crookes' tubes. 



Price, postpaid, 50 cents. 



H. D. C. HODGES, 874 Broadway, N. Y. 



AMERICAN WOODS 



A book on Woods, containing 

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SCIENCE 



TENTH YEAR. 



The use of Science by scientific men has increased in the past 

 few months as never before. More than tWO hundred Of the 



leading scientific men and women of America have 



agreed to contribute to the paper during the coming year ; and, 

 as others are constantly joining in this move, to make the paper more 

 valuable than ever, it cannot be long before there will be a body of 



five hundred competent users of this weekly medium 



of scientific discussion. It is our aim to ni-— ^^ 



hands of all competent persons wh^ ' '" 



tunity to make Science a .^ ui American scientific 



work than ever in the past. 



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literals, 

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 of Fossils, 

 Tical 

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Ward'sNatural Science Establishment 



Mineralogy, Geology, Paleontology, Zoology, Osteology, Anatomy. 



Send for Circular. ROCHESTER, N. Y. 



stuffed Animals 



and Skins, 



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Skeletons, 



Anatomical 



models, 



InTertebrates 



