842 EXPERIMENT STATION EECORD. 



The experiments as a whole indicate that the best seeds for any locality are 

 those which originate in that locality, although seed from similar environments 

 may be used to advantage when occasion requires. 



The influence of too deep planting on the longevity and yield of pine, 

 Geist (Ztschr. Forst u. Jarjdw., h^ (1913), No. 9, pp. 389-596) .—The author's 

 investigations lead him to conclude that pine trees make the greatest growth 

 when their principal roots are confined to the upper humus-containing layer of 

 soil. Growth development appears to be retarded in direct proportion to the 

 depth to which the trees are planted. The deeper the trees are planted the 

 greater is the danger of gaps or broken spaces in the resulting stand. 



The influence of forests upon climate, R. DeC. Ward (Pop. Sci. Mo., 82 

 {1913), No. Jf, pp. 313-331). — A popular discussion of this subject based upon a 

 review of the literature. Special attention is given to the relation between 

 forests and rainfall, but consideration is also given to the value of forests as 

 windbreaks; their influence upon temperature, humidity, and evaporation; in 

 collecting moisture from clouds and fogs ; upon hail and other storms ; and upon 

 water supply, erosion, and floods, as well as the hygienic influence of forests. 



The author concludes in general that, as far as this country is concerned at 

 least, the evidence is not sufficient to show that forests have any significant 

 effect upon the amount of rainfall. It is believed that further scientific data 

 are needed in order to draw any definite conclusions in regard to the relation 

 of fcjrests to climate. 



The correction of avalanches in Grisons, P. Mougin {Rev. Eau-o et Forets, 

 52 {1913), No. Jfl. pp. 513-532, figs. 8).— The author here describes various 

 methods, including that of afforestation, employed in Grisons, Switzerland, for 

 the control of avalanches. 



Some aspects of European forestry, A. B. Recknagel {Forestry Quart., 11 

 {1913), No. 3, pp. 323-348). —A further paper on this subject (E. S. R., 29, p. 

 342), in which the author discusses the management of hardwoods in eastern 

 France, natural regeneration in the Black Forest, and management of alpine 

 forests in Bavaria. 



Trees and shrubs, edited by C. S. Sargent {Boston and New York. 1913, vol. 

 2. pt. 4. pp. 191-278, pis. 25). — This is the eighth installment of the work on new 

 or little known trees and shrubs of the northern hemisphere which is being pre- 

 pared by the editor and others, chiefly from material at the Arnold Arboretum 

 (B. S. R., 26, p. 140). As in the previous installments, the important feature 

 of this part is the illustrations, which are accompanied by descriptions of the 

 species considered. 



Trees and shrubs of New Mexico, E. O. Wooton {New Mexico Sta. Bui. 87, 

 pp. 159, figs. 2G). — This bulletin supersedes a previous bulletin on the native 

 ornamental plants of New Mexico (E. S. R., 16, p. 471). Much of the general 

 discussion of the subject is here reprinted, but the list of plants has been ex- 

 tended to include all trees and shrubs of New Mexico, with notes on those that 

 are of value. Technical descriptions of the families and genera with keys 

 for the determination of species have also been included. 



Cedar woods, W. Dallimore {Roij. Bot. Gard. Kew, Bui. Misc. Inform.. 1913, 

 No. 6, pp. 207-224). — The author has here compiled a descriptive list of trees to 

 which the name cedar is applied. Information is given relative to the distin- 

 guishing characteristics of the wood of each species and its use, and in cases 

 where the wood is not generally known as cedar references are given to the 

 works in which the nair.o ip used. 



The latex system of i-ubber trees, A. Meunier {Mem. Sci. [Bchilnm], 1 

 {1912), No. 1, pp. 51-^17, pis. S).— The author here reports an anatomical study 



