46 EXPERIMENT STATION RECORD. 



Introductory cousiderations deal with the geology, climate, and forest geogra- 

 phy of the region under discussion. The succeeding chapters deal with the 

 silvicultural practices; ownership and management relations; utilization; 

 timber sales; wood industries and trade; strength investigations; transporta- 

 tion ; forest policies, laws, and administration ; the relation between the forests 

 and streams; game and hunting; and the national attitude toward the forests. 



Some Douglas fir plantations. — II, Cochwillan wood, near Llandegai, 

 North Wales, T. Thomson {Jour. Bd. Agr. [London^, 20 {1913), No. 6, pp. 499- 

 503). — In continuation of previous observations on Douglas fir plantations (E. 

 S. R., 29, p. 644) some diameter, height, and volume measurements are given for 

 a 58-year-old Douglas fir stand growing in a mixture with oak, near Llandegai, 

 North Wales. 



The structure of the wood of East Indian species of Pinus, P. Groom and 

 W. RusHTON {Jour. Linn. Soc. [London] Bot., 41 {1913), No. 283, pp. 457-490, 

 pis. 2). — In the first part of this paper the authors give their general con- 

 clusions and summarize the results secured from a detailed study of the wood 

 structure of 5 species of East Indian pine. The second part of the paper de- 

 scribes in detail the wood structure of the different species. 



The kapok trees of Togo, E. Ulbbich {NotizU. E. Bot. Gart. u. Miis. Berlin, 

 6 {1913), No. 52, pp. 39-65, figs. 2). — This comprises the results of inquiries sent 

 out to the various districts of Togo relative to the characteristics and varying 

 forms of the kapok trees. 



The " wood-oil " trees of China and Japan, E. H. Wilson {Bui. Imp. Inst. 

 [80. Kensijigton], 11 {1913), No. 3, pp. 44I-46I, pis. 5). — The author here gives 

 a descriptive account of the Chinese wood oils and the trees yielding them, with 

 special reference to the utilization of these facts by various departments of agri- 

 culture in the warm temperate and subtropical parts of the world which con- 

 template the experimental culture of these trees. A revision of the synonymy 

 with principal references to the literature is appended. 



Tagua, vegetable ivory, E. Albes {Bui. Pan Amer. Union, 37 {1913), No. 2, 

 pp. 192-208, figs. 21). — A descriptive account is given of the tagua palm {Phy- 

 telcphas macrocarpa) with reference to its botany and habitat, methods of 

 harvesting and marketing the tagua nuts, and their utilization in the manufac- 

 ture of vegetable ivory buttons. 



Uses of commercial woods of the United States. — Beech, birches, and 

 maples, H. Maxwell {U. 8. Dept. Agr. Bui. 12, pp. 56). — In continuation of 

 previous studies of the commercial woods of the United States (B. S. R., 2G, 

 p. 50) consideration is here given to the closely related beech, birch, and maple 

 group, including some 18 commercial species, with special reference to the phys- 

 ical properties, supply, and uses of the various woods. 



The wood-using industries of Iowa, H. Maxwell and J. T. Harris {Iowa 

 8ta. Bill. 142, pp. 237-304, PQS. i.S).— This report embraces the results of an 

 investigation conducted cooperatively by the Forest Service of the U. S. Depart- 

 ment of Agriculture and the Iowa Station relative to the utilization by various 

 industries in Iowa of wood after it has left the sawmill. The data presented 

 and discussed show the total demands for each species by the difi:'erent indus- 

 tries; cost of the raw material f. o. b. factory; the articles made from each 

 kind of wood; the relative amounts supplied by the State and by outside States; 

 and the qualities of the wood which recommend it for a specific use. 



A directory of Iowa wood users is given and the following special chapters 

 are also included: The Timber Resources of Iowa, by G. B. MacDonald (pp. 

 291-300) ; and White Pine in Iowa, by N. C. Brown (pp. 301-304). 



Forest products of Canada, 1912. — Lumber, square timber, lath, and 

 shingles, R. G. Lewis and W. G. H. Boyce {Dept. Int. Canada, Forestry Branch 



