FORESTRY. 43 



The rubber tree of Tonkin and North Annam (Bleekrodea tonkinensis), 

 P. Eberhardt and M. Dubard {Agr. Prat. Pays Ghaiuls, 10 (1910), Nos. 82, pp. 

 4-23, figs. 6; 83, pp. 112-131, figs. 10).— A general report on the Tonkin rubber 

 tree (E. S. R, 21, p. 444), relative to its history, geograpbic distribution, habitat, 

 biology, morphology, anatomy, latex and rubber, methods of tapping, and com- 

 mercial value of the product. 



Tapping experiments with Teo-Nong (Bleekrodea tonkinensis) rubber trees, 

 J. RouLLET (Bui. Econ. Indo-Chine, n. ser., 13 (1910), No. 82, pp. 1-11). Ex- 

 periments were conducted to determine the best methods of tapping the Teo- 

 Nong tree discussed above, as well as to study the character of the latex. 



The V-shaped cut gave the best returns. Although the rubber is of good 

 quality, the latex has a large resin content, and it is concluded that it will not 

 pay to harvest Teo-Nong latex from the wild trees. 



India rubber and gutta-percha, T. Seeligmann, G. L. Torrilhon aud H. 

 Falconet (London, 1910, 2. ed., rev. and enl., pp. XVI+J)9S+32, figs, l.'io). — 

 A revised and enlarged second edition of this work (E. S. R., 15, p. G80). 



The cultivation and preparation of Para rubber, W. H. Johnson (London, 

 1909, 2. ed., rev. and cnl., pp. XII + n'S-j-16, pis. 9, tigs. 23).— The present edition 

 of this work (E. S. R., 17, p. 774) has been rewritten and greatly enlarged to 

 include the latest authentic information on rubber culture in the East, as well 

 as a number of subjects likely to be of interest to those connected with the 

 rubber industry. 



Plantation rubber in 1909 and its future, H. Brenieb (Bui. Econ. Indo- 

 Chine, n. ser., 13 (1910), No. 83, pp. 206-2^2). — An economic review of rubber 

 conditions in tlie various producing countries, based upon the recent literature 

 of rubber production, references to which are included. 



Comparing plantation rubber with wild rubber, the author finds that the 

 evidence presented is in favor of the Hevea plantations of the East wherever 

 labor is abundant and rational exploitation is employed. On the other hand, 

 overcapitalization, overplanting, mismanagement, and the failure to recognize 

 proper conditions of soil, climate, and culture are apt to react unfavorably to 

 plantation rubber. 



Rubber culture in Mexico, H. J. Ludewig (Tropenpflanzer, U (1910), No. 

 10, pp. 510-521). — A general and statistical account of the rubber industry in 

 Mexico, including an outline of propagation experiments with Guayule rubber 

 being conducted by E. A. Caffey at the Los Cedros plantation. . 



Rubber culture in the Malay Peninsula, P. J. S. Cramer (Dc;jf. Landb. 

 Suriname Bui. 25, pp. 138, pis. 25, figs. 2.}).— This bulletin, which is based upon 

 an investigation tour of the rubber plantations in Colombo and the Federated 

 Malay States, is intended as a popular cultural guide for Suriname planters. 

 It discusses clearing the land, selection of soils, drainage, seed bed and nursery 

 practices, planting operations, catch crops, topping and pruning, diseases and 

 other pests, tapping methods, practices and instruments, transporting and coagu- 

 lating latex, and preparing rubber for the market. 



Report of the state forest administration of Bavaria (ilitt. Staatsforslrerw. 

 Bayerns, 1909, No. 9, pp. 207).— This is a statistical review of forest operations 

 in Bavaria for the year 1907. 



The data given show the extent of forest areas of all kinds at the beginning 

 of 1907, the volume and value of timber sales and the sale of minor products, 

 revenues and expenditures for the year, planting and road building operations, 

 net incomes, forest offenses, aud forest fires. The results of felling operations, 

 forest plantings, and other improvements in the forests belonging to communes, 

 institutions, and corporations are included. Summarized statistics are also 



