542 EXPERIMENT STATION RECORD. [Vol. 40 



extends, as the leafless season progresses, upwards in the trunk to the topmost 

 region. However, before this is reached and the center of the trunk at the top 

 of the bole has become a storage region of maximum moisture content a radial 

 movement has begun at the bottom of the truuk which likewise progresses up- 

 ward, and through it the region of maximum moisture content passes almost 

 to the outside of the trunk, leaving the center as the driest region during the 

 latter part of the leafless season. The movements upwards and radial, both 

 inwards and outwards, are going on synchronously at different levels in the 

 trunk. 



Partial tests with some other trees indicate that with but slight modifications 

 the observation on A. pseud oplntnnu ft may he regarded as applicable to most, 

 if not all, broad-leaved deciduous trees in the same region. 



Notes on North American trees. — IV, C. S. Sargent (Bot. Gaz., 67 (1919), 

 No. 3, pp. 208-242). — In continuation of previous papers (E. S. R.. 40, p. 248), 

 notes are given on the distribution and characteristics of several species of 

 North American trees. 



Botanical identifications of British Guiana trees and plants. L. S. Hohen- 

 kekk [Jour. Bd. Ayr. Brit. Guiana, 11 (1918), Xos. S. pp. 98-106; k. pp. 178- 

 185).— This comprises a descriptive list of trees and plants of British Guiana 

 which have been botanically identified at Kew from specimens collected by 

 C. W. Anderson. 



Synopsis of the genus Ochroma, with descriptions of new species. W. W. 

 Rowlee [Jour. Wash. Acad. Sci., 9 (1919), No. 6. pp. 157-167).— In view of the 

 increasing importance of balsa wood for making life rafts, life boats, and In- 

 sulating material, a survey was made in Central America in 1918 to determine 

 the amount of timber available and to Investigate as to the quality of the wood 

 and the kinds that grow in different regions. This paper comprises a brief 

 report of the taxonomic results of the survey. 



Investigation of the oil palm and its products, W. II. Johnson (Ann. Rp*. 

 Agr. Dept. south /Tors-.. Nigeria, 1911, pp. 8-10. 11-1$).— A variety test of oil 

 palms conducted at the agricultural stations Is briefly noted, and data are 

 given on oil extraction and wine tapping tests. 



Forests and forest planting ( Boix et Boixrmcnt. Pnrix: l.ihr. T.nrmixxr 

 [19181, pp. 32- ftfft. IS). — A forest planting pamphlet, dealing especially with 

 conditions in France and with afforestation of slopes, waste lands, and bottoms. 



Recreation uses on the National Forests, F. A. WATJGH (U. 8. Dcpt. Aor.. 

 Forest Serv., 1918, pp. 4$, fig*. 14). — A descriptive account of the National 

 Forests, with special reference to their facilities for providing various forms 

 of recreation for the public. 



Fifth biennial report of the State forester. J. C. Van Hook (Bien. Rpt. 

 StaU For( iter, Mont., 5 U9n-i*\. pp. W2. fig*. 6).— This report Includes a 

 general report 00 tire protection and other work conducted during the two years 

 1017-1S; a reproduction of Farmers' Bulletin 742 of the U. S. Department of 

 Agriculture on The White Pine Blister Rust, by P. Spauldlng (B. S. R., 85, p. 

 551) ; a report by E. EL Hubert on A Type of Winter-killing, Known as the 

 Red Belt Injury of Forest Trees, Occurring in the Vicinity of Helena, Mont., 

 and a special paper on the Economic Use of the Forests of Montana, by J. F. 

 Preston (pp. 44-99). The subject matter of this paper is presented under the 

 following general headings: Forest wealth of the State, production of forest 

 products, principal lumber trees of the state, consumption of forest products, 

 economic importance of the lumber industry, what the State should do for the 

 forest industry of Montana, and recommendations of legislative measures for 

 Improving the industry. 



