448 EXPERIMENT STATION RECORD. [Vol. 40 



under the Weeks Law to June 30, 1918, accompanied by a map showing the loca- 

 tion of the National Forests. 



Timber supplies and forestry in the Union, C. E. Legat (So. African Jour. 

 Sci., 15 (1918), No. 2, pp. 79-99). — An account of the forestry resources and 

 present status of forestry in the Union of South Africa, including measures 

 which are being taken to provide for the future timber requirements of the 

 Union. 



Annual progress report upon State forest administration in South Aus- 

 tralia for the year 1917-18, W. Gill (Aim. Rpt. State Forest Admin. So. 

 Aust., 1917-18, pp. IS, pis. 6). — This Is the usual progress report relative to the 

 administration and management of the State forests of South Australia, includ- 

 ing a financial statement for the year ended June 30, 1918. Data are given 

 relative to the alterations in forest areas, planting operations, yields in major 

 and minor products, revenues, expenditures, etc. 



Effect of grazing upon aspen reproduction, A. \V. Sampson (U. S. Dept. 

 Ayr. Bui. 741 (1919), pp. 29, pit. 5. figs. 7).— This bulletin reports a study con- 

 ducted on the Manti National Forest, in central Utah, during the years 1912 to 

 1916, inclusive, to determine the extent of injury to aspen reproduction by sheep 

 and cattle, the effects of such damage on the development of young trees, and the 

 best method of protecting the reproduction from injury without unnecessarily 

 restricting the grazing of live stock. 



The results are presented in a series of tables and diagrams and fully dis- 

 cussed. It is believed that the recommendations embodied herein may be of 

 value, with Blight modifications, in the case <>f farm woodlands in the Bast 

 where the forage under aspen Is converted into meat or butter fat. 



Manuring of Hevea brasiliensis, H. D, AlVSTKAD (Ayr. Jour. India. IS (1918), 

 No. 4, pp. 660-665; Trop. Ayr. [Ceylon], 51 (1918), No. 6, pp. SSI SS4).- Hie 

 author finds, after briefly reviewing the results of manuring experiments with 

 Hevea rubber in South India and Ceylon, that the results of practically all such 



experiments have been that the unmanured plats give quite as g 1 yields, if 



not better, than the manured ones. It is pointed out that the failure of manorial 

 treatments to show beneficial effect may have been due to the detrimental Influ- 

 ences of too close planting. It Is recommended that new manurial experiments 

 with Hevea should be designed from the start to test the Influence of manures 

 on trees widely spaced, and on trees thinned out early. 



The scientific principles of the budding of Hevea brasiliensis, W. BomxiOl I 

 (Arch. Rubbercult. Xcderland. Indie, 2 (1918), No. 11, pp. 861-877, flys. 11).— 

 From a theoretical examination of the three methods generally used in budding 

 Hevea trees (patch-budding, the inverted T process, and the Forkert method), 

 the author concludes that patch-budding has a great advantage over the two 

 other methods because by it regular and quick union takes place, first between 

 the rows of latex vessels, and second between the food-carrying sie\e tubes 

 which are necessary for the proper development of the plant. In the Inverted T 

 and Forkert methods, the growing together starts only after about six months, 

 when a new cambium unites both parts. 



On the structure, the degeneration, and the regeneration of latex rings 

 with Hevea trees, P. E. Keuchenius (Arch. Ruhbercult. Nedcrhind. lndi> , 2 

 (1918), No. 11, pp. 8S7-851, fiys. 8). — The structure, degeneration, and regenera- 

 tion of latex rings in Hevea trees are illustrated and described. 



The scraping of bark affected by canker Is held to be better than paring, be- 

 cause in scraping the bark the diseased tissues only are removed, and a V.wzc 

 number of uninfected latex rings Is preserved Intact, thereby hastening recoi 

 ery. Pared-off bark requires at least three years for regeneration. Paring the 



