Forestry in America. 65 



FOREST PATHOLOGY. 



Parasitism of Phoradcndron Juniperinum Liboccdri Bngclrn. 

 By E. P. Meincke. Vol. VII, No. i. 



In this article the author gives with scicntilic precision the details of 

 his study of this interesting and peculiar mistletoe. He discovered that 

 this plant, when it reaches a hiffh age, lives without green exterior or- 

 gans, and concludes that from the beginning it normallv abstracts not 

 only water and inorganic salts from the incense cedar, but organic food 

 as well. This conclusion, as he states, still needs anatomical proof. 



Use of Soil Fungicides to Prevent Damping-Off of Coniferous 



Seedlings. By Carl Hartley. Vol. VII. No. i. 



This article presents briefly the results of experiments at the Halsey 

 nursery in the sandhills of Nebraska, aiming to check the loss caused 

 by damping-off. Different acids were used in different strengths. The 

 results with sulphuric acid were satisfactory, but of course can not be 

 applied directly to other conditions. They, however, serve as a valu- 

 able suggestion for carrying on similar experiments elsewhere. 



WOOD TECHNOLOGY. 



The Philippines as a Source of General Construction Timber. 



By Dr. H. N. Whitford. Vol. VI, No. i. 



The author gives a concise account of the commercially important tim- 

 bers of the Philippines; showing where they are found, the stand ner 

 acre, and important technical qualities of each. He emphasizes the pre- 

 dominance of the Dipterocarp family of which the most important are 

 the lavans, the apitongs, and the yacals. It is interesting to note that 

 these forests, contrary to the popular idea, do not contain merely "hard, 

 durable timbers, scattered and hard to extract," but large quantities of 

 cheap construction timbers. (For further information on the Philippines 

 see article by R. C. Bryant, Vol. II, No. i.) 



History of the Investigation of Vessels in Wood. By C. D. 



Mell. Vol. VI, No. I. 



This article is a history of the investigation of vessels in wood, begin- 

 ning with Malpighi (1628-1694) to Von Mohl (1842), most space being 

 devoted to Von Mohl. The article contains no original researches, but 

 is a resume of the investigations of European scientists, and, as such, 

 forms a useful contribution to this phase of wood technology. 



GRAZING. 



Grazing in the National Forests. By L. F. Kneipp. Vol. VII, 



No. 2, 



This paper deals with relationship between the live stock industry and 

 the National Forests, and the dependence of this industry upon the forage 

 which the Forests contain. The effect of grazing on the Forests, and of 

 forestry on grazing is mentioned, and the importance of not disturbing 

 the grazing industry is emphasized. The great benefits which the live 

 stock industry has received from regulation of the range by the Forest 

 Service are barely touched upon. 



