258 • THE POPULAR SCIENCE MONTHLY 



J. B, S. Norton, all of whom worked more or less upon the fungi of the 

 locality while at the garden. Dr. S. M. Coulter, assistant professor of 

 botany in the Shaw School of Botany, has, ever since coming to St. 

 Louis, been working upon ecological problems. 



The second group of botanists is a small one, of whom the following 

 have been more or less intimatelv connected with the local work being 

 carried upon the flora of the vicinity : Dr. Hermann von Schrenk, 

 in charge of the Mississippi Valley Laboratory until its removal to 

 Washington in 1907, has published a number of scientific papers deal- 

 ing with the diseases of forest trees and of timber. Some of these 

 were worked out from material collected around St. Louis, either par- 

 tially or entirely. Dr. von Schrenk continues his work at St. Louis, 

 having severed his relations with the United States Department of 

 Agriculture upon the removal of the Mississippi Valley Laboratory 

 from St. Louis to Washington. Drs. G. G. Hedgcock and Perley 

 Spaulding, assistants of Dr. von Schrenk, were also engaged upon 

 problems relating to the diseases of fruit and forest trees. All three 

 have collected the fungi of the vicinity, and have been intimately con- 

 nected with the botanical activities of the place. 



Besides the above workers should be mentioned Mr. John Kellosfg, 

 long employed by the garden, who is very familiar with the local flora, 

 and has a very good private herbarium; Dr. N. L. T. Nelson, who is 

 collecting the mosses of the vicinity; Mr. 11. M, T. Hus, who is col- 

 lecting the algse; and numbers of others who have collected in the lo- 

 cality at various times. 



