542 EXPEKIMENT STATION RECORD. 



methods, time of plantinj?. preparation of the soil, spacing, cultivation, thin- 

 ning, pruning, choice of species for mixed plantations, protection, yields, and 

 returns. Each species recommended for planting is considered with reference 

 to its silvicultural requirements, soil adaptation, planting distances, planting 

 method, products, and age of maturity, with reference to the prairie, central 

 Imrdwood, and northeast regions. Introductory considerations deal with the 

 opportunities for forest planting and the present status of forest planting in 

 the eastern United States. Data on the prices of nursery stoclt, officers in 

 charge of forestry in various States, together with literature dealing with plant- 

 ing are .'ipiiendod. 



Forest, shade, and ornamental trees, O. A. Thompson and J. H. Shepperd 

 (North Dakota Sta., Rpt. Edgelcy Suhsta. 1912, pp. f/.'i-50). — Notes are given 

 on the behavior of a number of trees and shrubs which have been tested at 

 the substation with reference to their value for shelter belts, windbreaks, 

 hedges, and ornamentals. 



The Araucaria woods of Chile, R. E. Baquedano (Bol. Basques, Pesca i 

 Caza, 2 {19U), No. 10, pp. 509-524. fig»- ^0).— This embraces the results of a 

 survey of the Araucaria forests of Chile with reference to their extent and dis- 

 tribution, habitat, amount of standing timber, natural products, possibilities 

 of exploitation, etc. 



The eastern hemlock, E. H. Frothingham (U. S. Dept. A(jr. Bui. 152 {1915), 

 pp. JfS, pis. 5, figs. 3). — This bulletin discusses the eastern bemlocli with refer- 

 ence to its geographical and commercial range; amount and value of stand- 

 ing timber ; utilization ; structure and development of the tree ; associated 

 species; effect of light, soil, and moisture on the composition of the stand; 

 reproduction; rate of growth; susceptibility to injury; and the status of hem- 

 lock in forest management. A number of volume tables, applicable chiefly to 

 average trees in the Lake States and Southern Appalachian region, are 

 appended. 



The author concludes, in brief, that hemlock grows too slowly and is of too 

 little commercial value to be recommended for planting or for encouragement 

 among natural second growth as a timber tree. The management of hemlock 

 will ultimately be restricted to lands useless not only for agriculture but also 

 for growing many kinds of commercial timber. It is desirable as a decorative 

 tree for parks, and its heavy foliage and shade endurance give it exceptional 

 value for the protection of stream sources. By virtue of its tolerance of shade 

 hemlock adapts itself for gi-owth as a subordinate stand among other kinds 

 of timber. In such cases it materially increases the yield per acre and at the 

 same time protects and enriches the forest soil, thereby tending to accelerate 

 the growth of the other species. 



The life history of lodg'epole pine in the Rocky Mountains, D. T. Mason 

 {TJ. S. Dept. Agr. Bui. 154 U915), pp. 35, pis. 5. fig. i).— In this bulletin the 

 author discusses the lodgepole pine with reference to its geographical distribu- 

 tion and altitudinal range; size, age, and haliit; climatic, soil, moisture, and 

 light requirements; reproduction; growth; causes of injury; associated species; 

 permanency of lodgepole type : ground cover ; age classes ; and yield. 



[Relative success of timber-producing' species at the Avondale Forestry 

 Station] {Gard. Chron., 3. ser., 57 {1915), No. 1J,6S. p. 77).— A summary of 

 results secured during the first five years in gi'owing various conifers and 

 broad-leaved species at the station. The trees are arranged in order of their 

 rate of growth and with reference to their hardiness. 



Report on supplies of home-grown pit wood in England and Wales, T. H. 

 MiDDLETON {Bd. Agr. and Fisheries [London], Rpt. Supplies Ilomc-Grou-n Pit 

 Wood, England and Wales, 1914, pp. 13). — This report embraces the results of 



