FORESTRY. 45 



[Report of the] committee on forests, C. Leavitt et al. {Com. Consevv. 

 Canada Rpt., 4 {1913), pp. 16-31, 178-180, pis. 5).— This comprises the report 

 of the forestry committee of the Commission of Conservation of Canada for the 

 fiscal year ended March 31, 1913, including also the resolutions pertaining to 

 forestry that were adopted by the commission. 



Forest policy of British Columbia, W. R. Ross {[Victoria], 1913, pp. 17). — 

 This is a full report of the author's speech in which he reviews the progress 

 that forest conservation has made in British Columbia. 



Avondale Forestry Station, A. C. Forbes {Dept. Agr. and Tech. Instr. Ire- 

 land Jour., 14 {1913), No. 1, pp. 102-125, pis. 6). — This comprises a general 

 description of the Avondale Forestry Station, including a progress report of 

 the work for the period 1906 to 1912. 



Report on forest statistics of Alsace-Lorraine {Beitr. Forststatis. Elsnss- 

 Lothringen, 1911, No. 30, pp. 100, figs. 17). — This is the customary statistical 

 review, for the year 1911, relative to the administration of the state, public, 

 and community forests in Alsace-Lorraine. Detailed and summarized data 

 dealing with forest areas, silvicultural operations, products, revenues, ex- 

 penditures, etc., are given, including a comparative summary for each year 

 since 1872. 



The sun energ-y in the forest, M. Wagner {Allg. Forst. u. Jagd Ztg., 89 

 {1913), June, pp. 185-200; July, pp. 225-242, fig. 1; Sept., pp. 297-316, fig. 1; 

 Oct., pp. 333-351, fig. 1). — A study of the relation of the sun's energy to forest 

 growth, in which the author sets forth his observations and deductions in a 

 series of articles as follows: (1) The Influence of Geographic Latitude on 

 Crown Development, Volume Production, Stem Basal Area, Stem Number, and 

 Brush Wood; (2) The Distribution of the Sun's Rays in the Forest, with 

 Special Reference to the Selection Strip Cutting; (3) The Absorption of Sun 

 Ehiergy in Green Plant Leaves and Its Relation to the Locality and to Volume 

 Production; and (4) Light Measurements in the Forest and Their Importance 

 for Practical Forestry. 



Contribution to the knowledg-e of the influence of aquatic mediums on the 

 roots of trees, G. Bondois {Ann. Sci. Nat. Dot., 9. ser., 18 {1913), No. 1-2, pp. 

 1-24, fi9S. 9). — The author's investigations as here reported lead him to con- 

 clude in general that although the adaptation of tree roots to aquatic mediums 

 may be less marked than their adaptation to aerial mediums it is nevertheless 

 quite appreciable. The roots appear to be influenced by both the physical and 

 chemical nature of the water. Since water is a homogeneous medium the rnot 

 growth is equal and symmetrical in all directions. On account of its density 

 the water acts as a partial support to the roots, whence arises a reduction in 

 the supporting system. In order to adapt themselves for flonting the roots 

 lighten themselves by the development of air cells. Since the food supplied 

 to the roots is liquid the absorption and conducting systems become retluced. 

 Since the absorption takes place throughout the emerged surface a great abun- 

 dance of lenticels are formed on the older roots. 



Florida trees, J. K. Small {New York, 1913, pp. IX -{-107). —This handbook 

 contains descriptions of all the trees known to the author to be native to or to 

 grow naturally in Florida. 



The forests of the Far East, A. Hofmann {Aus den Waldnngen dcs fernen 

 Ostens. Vienna and Leipsic, 1913. pp. VIII +225, pis. 56. figs. P).— A descriptive 

 account of the forests and of forestry in the Far East, based upon the author's 

 travels and studies in Japan, Fornjosa, Korea, and the bordering districts of 

 eastern Asia, together with a review of the literature on the subject. 



