FOEESTRY. 647 



A method of investigating yields per acre in many aged stands, H. H. 

 Chapman {Forestry Quart., 10 {1912), No. 3, pp. 458^69, figs. 3).— The author 

 discusses the principles involved iu determining the area occupied by each age 

 class iu a managed forest and gives the details of a plan applied to uneven 

 aged stands of shorlleaf pine in Arliansas. 



On the arrangement of silvicultural experiments and the classes of forest 

 yield tables, Vater {Tharand. Forstl. Jahrb., 63 {1912), No. 8, pp. 252-264).— A 

 discussion of methods of conducting silvicultural experiments. 



Seventh annual report of the Forest Park Reservation Commission of New 

 Jersey for the year ending October 31, 1911 {Ann. Rpt. Forest Parle Reserv. 

 Com. N. J., 1 {1911), pp. 92, pis. 14). — This contains a summarized report of the 

 work of the Forest Commission (pp. 9-18), together with the following detailed 

 reports: The Forest Fire Service, by C. P. Wilber (pp. 19-67), and Report of 

 the State Forester, by A. Gaskill (pp. 68-90). 



Progress report of forest administration in the Province of Eastern Bengal 

 and Assam for the year 1910-11, A. V. Monro and H. Carter {Rpt. Forest 

 Admin. East. Bengal and Assam, 1910-11, pp. 92, pi. 1). — ^This is the customary 

 report relative to the constitution, management, and administrtition of the state 

 forests of Eastern Bengal and Assam, including the financial results for the 

 year. All of the important data are appended in tabular form. 



Report on state nurseries and plantations for the year 1909—10, W. C. 

 Kensington {New Zeal. Dept. Lands, Rpt. State Nurseries and Plantations, 

 1909-10, pp. S8, pis. 6). — This comprises the combined reports of the superin- 

 tending nurserymen of the New Zealand forest nurseries and plantations under 

 their supervision for the financial year ended March 31, 1910. 



Emory oak in southern Arizona, F. J. Phillips {U. 8. JQept, Agr., Forest 

 Serv. Circ. 201, pp. 15, pis. 5). — An account is given of the Emory oak {Quercus 

 emoryi) relative to its range and occurrence, climate, soil and moisture require- 

 ments, associated species, characteristics of the tree, causes of injury, utiliza- 

 tion, and management. 



Report on the investigation of bamboo as material for production of paper 

 pulp, W. Raitt {Indian Forest Rec., 3 {1912), No. 3, pp. 37, pis. 2). — This com- 

 prises a report of investigations conducted under the direction of the Forest 

 Research Institute to determine the suitability of 5 different species of bamboo 

 for the manufacture of cellulose at a marketable cost. 



The author found that where the cost of delivery to mill sites is not ex- 

 cessive, all 5 species are suitable for the manufacture of cellulose, and that all 

 the species, except one, may be mixed in treatment. The culms of all ages 

 may be mixed indiscriminately in treatment, and nodes need not be rejected, 

 providing the following treatment is adopted: Culms not to be cut until the 

 shoots of the year are full-grown ; a period of seasoning of not less than 

 3 months to elapse before they are used ; crushing ; extraction of starchy matter ; 

 and digestion with sulphate liquor. Neither the sulphite nor the soda process 

 was found to be economical in the production of cellulose from bamboo. 



Rubber: Its culture and preparation, K. W. Wolf-Czapek {Der Kautschulc: 

 Seine Geivinnung und Verarbeitung. Berlin, 1912, pp. 132, figs. 51). — This com- 

 prises a concise handbook of information relative to the collection, preparation, 

 commerce, and chemistry of rubber, as well as the vulcanization and manu- 

 facture of soft and hard rubber articles. 



A short bibliography is appended. 



[Rubber in the Federated Malay States], L. Lewton-Beain (Fed. Malay 

 States, Rpt. Dir. Agr., 1911, pp. 1-10). — A report on rubber culture in the 

 Federated Malay SUites for the year 1911, which discusses acreages, cultiva- 



