244 Forestry Quarterly. 



which have either their northern, western or southern line of 

 termination passing through Kentucky, this pubhcation will be 

 greatly appreciated by investigators who are concerned with 

 larger problems of forest distribution. W. H. L. 



Forest Tree Diseases Common in California and Nevada. A 

 Manual for Field Use. By E. P. Meinecke, Forest Pathologist, 

 Bureau of Plant Industry. U. S. Forest Service. Washington, 

 D. C. 1914. Pp. 67. 



"This manual, designed for practical use in the field, discusses 

 only the more important tree diseases found in California and 

 parts of Nevada, though most of them are common also in other 

 forest regions. Its aim is to enable the field man to determine 

 the cause of the commoner diseases and injuries and to under- 

 stand their effect on the living tree. It discusses also ways and 

 means of control of fungi and mistletoes, as well as climatic, bio- 

 logical, and soil conditions which bring about diseases in forest 

 trees." 



The above opening paragraph of the manual states admirably 

 the scope of the publication. The author deserves much credit 

 for successfully presenting a highly technical subject in popular 

 form well adapted to the use of forest rangers and other field 

 men. 



Before entering into a discussion of the common tree diseases 

 and the fungi which cause them, several pages are devoted to a 

 brief, comprehensive description of the structure and normal 

 functions of the tree, as a basis for the understanding of disease 

 which the author defines as an unbalancing of normal functions. 

 This is followed by a brief discussion of disease and its more 

 common causes in trees, methods of examining and diagnosing 

 abnormalities, and a description of the more common symptoms 

 of poor health. 



The nature and development of fungi, their mode of growth 

 and their effect on plant tissues are next discussed, and the more 

 common forms of their fruiting bodies are described. 



The description of the diseases of trees is divided into two 

 parts ; first, the diseases affecting the increment, that is the future 

 timber supply, and second, the diseases affecting the present 

 supply of timber. 



