FORESTRY. 641 



The forests of central British Columbia, H. R. Christie (Forestry Quart., 

 13 {1915), No. If, pp. Jf95-503). — A short descriptive account of the forests and 

 timber resources of central British Columbia. 



Forest investigations in Canada. — Proposal for a ;tiational organization 

 for technical investigations, W. N. Millar (Forestry Quart., 13 (1915), No. 

 4, pp. 504-521). — Tlie author considers the present status of the forestry profes- 

 sion in Canada, and outlines the scheme whereby the Dominion Forestry 

 Branch pUms to undertake the investigation of tlie forestry problems of 

 Canada and to coordinate the technical work of all Canadian forest organiza- 

 tions. 



Working plans: Past history, present situation, and future development, 

 B. MooKE (Proc. Soc. Amer. Foresters, 10 (1915), No. 3, pp. 217-258) .—In this 

 paper the author reviews the past history and present conditions of govern- 

 mental forest working plans and discusses the probable future development of 

 working plans. 



The use of the plane table in making forest maps, S. B. Locke (Forestry 

 Quart., 13 (1915), No. 4, pp. 445-4^6, pis. 3). — A discussion of the application 

 of plane table methods of mapping to mountainous countries with broken cover. 



The profile alidade, an instrument that may prove useful in mapping 

 strip lines, S. B. Detwileb (Forestry Quart., 13 (1915), No. 4> PP- 4^'^-441^ P^- 

 1, figs. 2). — The author describes the application of the profile alidade in 

 mapping forest strip lines. As a result of test lines run over several areas it 

 is concluded that the alidade promises greater speed and accuracy than the 

 Abney hand level (E. S. R., 33, p. 843). 



Saving labor in measuring heights, — A new principle applied to the 

 hypsometer, S. B. Detwileb (Forestry Quart., 13 (1915), No. 4, PP- 442-444, 

 figs. 3). — The author here describes and illustrates an adjustable sighting arm, 

 applied to a hand hypsometer, which automatically remains fixed on the point 

 to which it is set and permits of the free movement of the principal sighting 

 arm without affecting the accuracy of measurement. 



Further notes on frustum, form factor volume tables, D. Bruce (Proc. Soc. 

 Amer. Foresters, 10 (1915), No. 3, pp. 315-321, figs. 2).— In continuation of 

 previous investigations (E. S. R., 27, p. 348; 31, p. 640) the author here shows 

 the applicability of the frustum form factor method to Douglas fir, western 

 larch, and Engelmann spruce. Some short-cut methods of constructing frustum 

 form factor volume tables are also given. 



The use of frustum form factors in constructing volume tables for western 

 yellow pine in the Southwest, C. F. Korstian (Proc. Soc. Amer. Foresters, 

 10 (1915), No. 3, pp. 301-314, figs. 3). — The author here reports an experi- 

 mental trial of the frustum form method of constructing volume tables, advo- 

 cated by Bruce as noted above. From the work conducted with yellow pine 

 it is concluded that the frustum form factor method is more adaptable for con- 

 structing local volume tables and much cheaper than the conventional method. 



The application of reconnaissance data to the problem of marking timber 

 for cutting, R. H. Boeekeb (Forestry Quart., 13 (1915), No. 4, PP- 4^7-4^4)- — 

 A study of data secured from reconnaissance work in pure western yellow pine 

 stands with reference to its application to the management of these stands. 



A system of cost accounts for a forest tree nursery, B. A. Chandler 

 (Forestry Quart., 13 (1915), No. 4, PP- 468-471)- — The system is described, 

 including a sample work report and ledger account. 



Table for determining profits in holding second growth, W. D. Sterrett 

 (Forestry Quart., 13 (1915), No. 4, pp. 472, 473).— The table here given is ap- 

 plicable to second growth stands which can be purchased at given prices per 



