FORESTRY. 449 



study of the results of various European tests of forest seed from different 

 countries in whicli the author points out that diseased conditions among forest 

 stands may often be attributed to the use of seed procured from a climate and 

 under conditions dissimilar to the climate and conditions where the stand is to 

 be established. 



Comparative soil moisture determinations in the litter experimental areas 

 of the pine forests in Wiener-Neustadt, R. Wallenbock (CentM. Gesam. 

 Forstiv., 37 (1911), No. 5, pp. 197-209).— In connection with the litter experi- 

 ments which have been conducted in pine forests for a number of years under 

 the direction of the Mariabrunn Forestry Station, Bohmerle found that a moss 

 cover as compared with annual raking was unfavorable for regeneration by 

 seeding (E. S. R., 20, p. 945) and also appeared to retard the growth of the 

 trees during a dry season (E. S. R., 24, p. 445). Following up these investiga- 

 (ions the author conducted soil moisture detei'minations of the experimental 

 areas in the years 1909 and 1910. The results are presented in detail. 



The most important variation between the water behavior in the moss-covered 

 soil and in the annually raked soil was the more rapid drying out but at the 

 same time quicker restoration of water in the raked area. In a dry year the 

 raked area can take up water from the light summer rains, whereas the moss- 

 covered area conserves the water for a short time only and prevents the light 

 showers from reaching the underlying soil. 



In connection with the results secured by Bohmerle, the author concludes 

 that the harm done by a moss cover during dry years is far greater than the 

 benefit derived through the greater amount of water stored in wet years. 



The white pines of Montana and Idaho: Their distribution, quality, and 

 uses, F. I. Rockwell (Forestry Quart., 9 (1911), No. 2, pp. 219-231).— X 

 general discussion. 



Memorandum on teak plantations in Burma, F. A. Leete ( [Indian'\ Forest 

 Bui. [n. ser.], 1911, No. 2, pp. 21, dgms. -'/). — This memorandum summarizes all 

 the data that were available up to 1909 relative to the growing stock in teak 

 plantations in Burma. The conclusions arrived at are embodied in the form of 

 a series of curves, and a tabular summary illustrates the relation between age, 

 girth, number of stems and height for fully stocked plantations in which thin- 

 nings are started as soon as required and are repeated every 10 years. 



Note on the relative strength of natural and plantation-grown teak in 

 Burma, R. S. Peakson ({Indkinl Forest Bui. [n. ser.'], 1911, No. 3, pp. 9, 

 pi. 1). — Pieces of both kinds of teak of similar dimensions and containing 

 approximately an equal amount of moisture were selected, both sets of tests 

 being carried out with the same machine. 



The results obtained for both classes of timber were very similar, and it is 

 concluded that in as far as the wood tested is concerned, there is little differ- 

 ence in the strength of natural and plantation-grown teak. Although in the 

 test for the coefficient of transverse strain the natural-grown wood has proved 

 superior in strength to the artificial product, the strength of the latter is suffi- 

 ciently high. 



The culture of Hevea in the Malay Peninsula, P. J. S. Cramer (Proc. Agr. 

 Soc. Trinidad and Tobago, 11 (1911), No. 1, pp. XV+130, pis. 25, figs. 2//).— This 

 is an English translation of Bulletin 25 of the Suriname Department of Agri- 

 culture (E. S. R., 24, p. 43). 



Silvicultural treatment of abandoned pastui'es in southern New England, 

 P. T. CooLiDGE (Forestry Quwrt., 9 (1911), No. 2, pp. 235-261, pis. 2). — Sugges- 

 tions are given relative to the silvical treatment of various types of brush on 

 old pastures. 



