Periodical Literature. 277 



near the ground line reveals a canker covered with minute black 

 pustules of some fungus. Sometimes the trees are entirely gir- 

 dled, the lesions extending 3 or 4 inches from the ground in some 

 cases. Nine fungi have been isolated from the bark of dying 

 trees and several more from the bark of dead trees, the one of 

 constant occurrence being a species of Fusicoccum. Pure cul- 

 tures have been made of all the fungi found on the dying trees, 

 and inoculations with these species on healthy trees in the green- 

 house are now in progress. The results of these together with a 

 more detailed account of the disease will be published later. 



Owners of white pine plantations are advised to be on the 

 watch for this trouble which is quite probably of parasitic na- 

 ture and liable to spread disastrously. Where found, it is ad- 

 visable to remove all diseased trees, or at least the portion of 

 the stem affected, and burn them. 



Mycologia, Vol. VI, No. 2, 1914, pp. 84-87. 



C. T. Greene describes Agromysa pruin- 

 Cambium Miner osa, a dipterous insect, the larva of which 

 in mines in the cambium of living trees. These 



River Birch. mines or tunnels heal over but leave scars 

 known as pith-flecks in the wood. The 

 pith-flecks in birch were carefully studied, and it was decided 

 that the species in question is at least one of the insects that pro- 

 duce pith-flecks, and it is possibly the only one. This is claimed 

 to be the first recorded instance in America of the production of 

 flecks in birch by a definitely known species. 

 Journal of Agricultural Research, Vol i, No 6, 1914, pp. 471-474. 



MENSURATION, FINANCE AND MANAGEMENT. 



Investigations carried on by A. P. Tol- 



Weather sky at the forest experiment station in the 



and Province of Samara upon the progress of 



Height Growth. the development of plantations and their 



growth in height led him to the following 



conclusions : 



d) The growth in height of young shoots of Scotch pine in 

 southeastern European Russia takes place during the months of 

 May and June ; the growth of the pine needles in July and Aug- 

 ust. This phenomenon has been annually confirmed by observa- 

 tions extended for four years, between 1908 and 1912. 



