742 Forestry Quarterly. 



Weinkauff, while substantiating the observations of Tubeuf 

 and others as to the susceptibiHty of thin-barked species and the 

 greater harmfulness of standing water, summarily dismisses the 

 asphyxiation hypothesis and ascribes the injury to the high tem- 

 perature of the water, particularly during hot humid weather 

 when evaporation was greatly reduced. This, he thinks, explains 

 why the roots were so little injured. He suggests that the 

 "bridges" are only areas where the bark is thicker. 



Tubeuf takes up these arguments in a second article and shows 

 they are not as plausible as the hypothesis, stating that it ap- 

 pears from experiments conducted during the hot summer of 

 191 1 that temperatures under 48°C are not fatal, and these can 

 only be reached by direct insolation and low evaporation. 



Hochwasserschaden in den Auwaldungen des Rheins nach der Uber- 

 schwemrniing im Sommer 1910. Naturw. Zeitschr. f. Forst u Landw. 10, 

 1912. Pp. 1-21. 



Sonimerhochwasser am Rhein im Jalire 1910. Ibid. Pp. 294-296. 



Waldschaden durch Sommcrlioclnvasscr. Ibid. Pp. 296-298. 



The Moore bill appropriating $80,000 for 

 Chestnut the study and control of the chestnut blight 



Blight. disease passed Congress in August toward 



the end of the session. $10,000 of this fund 

 is set aside for the study of insects associated with the disease. 

 The remainder of the funds are to be administered by the Labor- 

 atory of Forest Pathology, Bureau of Plant Industry, of which 

 Dr. Haven Metcalf is in charge. The force of pathologists and 

 assistants has been greatly increased and active investigation 

 is under way. 



The Pennsylvania Chestnut Tree Blight Commission, operating 

 under a State appropriation of $275,000, has also recently reor- 

 ganized its technical staff with Dr. F. D. Heald, pathologist (with 

 6 assistant pathologists), A. G. Ruggles, entomologist, J. P. Went- 

 ling, forester, Caroline Rumbold, physiologist (tree medication), 

 F. P. Gulliver, geographer, Roy G. Pierce, tree surgeon, Jos. 

 Schrawder, chemist. 



The Commission's report of the conference held at Harrisburg 

 the latter part of February was issued in August. The volume 

 is illustrated and contains 253 pages of matter consisting largely 

 of original papers and discussion. Some sixteen papers cover- 

 ing various aspects of the disease and setting forth the different 



