216 THE PLANT WORLD. 



factor influencing vegetation, by Burton E. Livingston; Air 

 drainage as affecting the hardiness of plants, bv E. A. Bessey ; 

 The real factors in acclimatization, bv E. E. Clements; Plant 

 imjDrovements needed in specific cases, by W. M. Hays ; Studies 

 on the acclimatization of plants in the prairie regions, by L. H. 

 Pammel ; Experiments in plant acclimatization in Alaska, by 

 W. H. Evans. The paper by Dr. MacDougal will lie printed 

 with three full page illustrations in the October number of The 

 Plant World. 



A i)'ir(i/ ffoni the Desert Lahoralori/. accompanied by Pro- 

 fessor J. P. Goode, of the Eniversity of Chicago ; Tiv. IT. J!^. 

 AVhitford, of the Bureau of Eorestry of the Philippines, and Dr. 

 AV. B. AlacCallum, spent two weeks in September in o]3erations 

 at the elevated mountain plantations connected with the Desert 

 Laboratory in the Santa Catalina Mountains. A great number 

 of acclimatization exchanges have been effected and a few species 

 are now growing over a vertical range of a mile. 



Professor and Jl/r.s. V. 21. Spaldinfj are in Washingotn for 

 the purpose of consulting the collections of the U. S. National 

 Museum. 



Dr. D. T. MacDougal lectured at the Brooklyn Institute on 

 the evening of October 4, and at the Xew York Botanical Garden 

 on the afternoon of the 5th on the Salton Sea and the changes in 

 the vegetation of the enclosing basin. 



Dr. J. Arthur Harris, of the Alissouri Botanical Garden, 

 has accepted a ]iosition on the staff of the Station for Experi- 

 mental Evolution at Cold Spring Harbor, in place of Dr. E. 1^. 

 Transeau. 



Professor James W. Tourney, of the Yale School of For- 

 estry, and formerly botanist of the University of Arizona, spent 

 a portion of his summer vacation in Southern Arizona. 



Dr. David Griffiths of the Bureau of Plant Industry, Wash- 

 ington, D. C, spent several days in September at Tucson to con- 

 tinue range investigations in the Santa Rita Mountains. 



