348 EXPEEIMENT STATION" RECORD. 



tables, with special reference to the spruce, pine, and beech, based on an exami- 

 nation of tables prepared by various authorities. The study is discussed under 

 the following general headings : Contents of yield tables, the conception of 

 normal stand, application of yield tables, and the future returns from yield 

 investigations. 



Assistance to private owners in the practice of forestry (U. S. Dept. Agv., 

 Forest Serv. Circ. 203, pp. 8). — This circular supersedes Circular 165 (E. S. R., 

 21, p. 444). It discusses the aims and, nature of assistance given and contains 

 the regulations governing cooperation with private owners, together with 

 sample application forms. 



Some permanent sample plat studies, C. F. Kobstian (Forest Club Ann. 

 [Univ. Nehr.], J, (1912), pp. 115-127, pis. 2). — The author describes in detail 

 some permanent sample forest plat studies which are being conducted by the 

 Forest Service of Ihe U. S. Department of Agriculture in the Sierras. 



A method for determining the effects of forests upon run-oflE in the Rockies, 

 R. D. Garveb (Forest Cluh Ami. {Univ. A^eftr.], 4 (1912), T>p. 68-73).— The 

 author outlines a plan for the determination of the effects of forests upon 

 streams. 



The effect of forest fires on trees and reproduction in southern New Eng- 

 land, P. L. BuTTRicK (Forestry Quart., 10 (1912), No. 2, pp. 195-207, fig. 1).— 

 This paper discusses the factors influencing the resistance of trees to fire, the 

 after efl'ects of a single fire, the effect of recurring fires, fire in relation to 

 sprouting, the effect of forest fires on reproduction, and the effect of age on 

 resistance. 



The need of fire protection in the Tropics, C. E. C. Fischer (Indian Forester, 

 88 (1912), No. 5, pp. 191-221).— A review of the literature on this subject. 



Rainfall a factor of tree increment, F. Davis (Forestry Quart., 10 (1912), 

 No. 2, pp. 222-228, fig 1). — Finding that the work of several European investi- 

 gators appeared to show a correlation between tree increment and the amount 

 of annual rainfall, the author studied tree specimens, principally from New 

 England and the Eastern States, in conjunction with the monthly rainfall 

 records. The results as here tabulated and discussed indicate that rainfall 

 is a great factor in tree increment. 



Notes on winterkilling of forest trees, C. P. Hartley (Forest CUih Ann. 

 [Univ. Nehr.], 4 (1912), pp. 39-50). — This comprises notes on the occurrence and 

 nature of winter injury to forest trees as observed in district 2 of the Forest 

 Service of the U. S. Department of Agriculture, including Colorado, Kansas, 

 Nebraska, part of South Dakota, and Wyoming. 



A new method of constructing volume tables, D. Bruce (Forestry Quart., 

 10 (1912), No. 2, pp. 215-221). — The author describes a method of constructing 

 volume tables which involves the use of what is termed the " frustum " form 

 factor. 



Sand blast tests of New South Wales timbers, W. H. Warren (Jour, and 

 Proc. Roy. Soc. N. 8. Wales, U (1910), pt. 4, pp. 620-630, pis. 5, figs. ,4).— The 

 tests here described wei'e conducted in order to obtain the relative values of 

 timbers for wood paving, flooring, and similar purposes. 



On the durability of railroad ties, K. Ha^'elIk (Centhl. Gesam. Forstw., 38 

 (1912), Nos. 3, pp. 105-115; J,, pp. 172-182; 5, pp. 22.'t-233, figs. 5).— This is a 

 review of recent investigations along this line, with conclusions based on a 

 study of the results as a whole. 



Quantity and quality of creosote found in two treated piles after long 

 service, E. Bateman (U. S. Depi. Agr., Forest Serv. Circ. 199, pp. 8, pi. 1, 

 fig. 1). — This circular gives the results of analyses of creosote found in 2 



