ANNOUNCEMENT. 



At the suggestion of Mr. Frederick V, Coville, botanist of the 

 United States Department of Agriculture, the Advisory Committee 

 on Botany of the Carnegie Institution, recommended the establish- 

 ment of a Desert Botanical Laboratory in the arid region of the United 

 States, the purpose of such establishment being to thoroughly study 

 the relation of plants to an arid climate and to substrata of unusual 

 composition. Mr. Coville and Dr. D. T. MacDougal, v^^ho were 

 already well acquainted with the arid regions of the United States, 

 were requested to act as a committee of inquiry on this subject. The 

 results of their inquiry are herewith presented, from which it will ap- 

 pear that a site for a botanical laboratory has been selected near Tuc- 

 son, Arizona. Dr. W. A. Cannon, of the New York Botanical Gar- 

 den, to whom a grant had been made by the Carnegie Institution, in 

 aid of research, has been appointed Resident Investigator in charge 

 of the Laboratory. A suitable structure has been erected, and the 

 investigations commence in the autumn of 1903. 



Daniel C. Oilman, 

 President of the Carnegie Institution. 



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