FORESTRY. 245 



Reports on the forest administration in Burma for the year 1908-9 

 (/>>/.s. Forest Ailinhi. liurimi. I!)08-!I, iip. .2in'-\-(i). — This is the usual aiuiual 

 stateiiicnf of dponitions iu (he state forests of Ihe I'c.i^u, Teuassarini, Northern 

 and Southern circles uf Ilurma, includinj^ information relative to alterations 

 iu forest areas, forest settlements, surveys, protection, silvicultural operations, 

 exploitation, financial results, and administration work. Important features 

 of the worlv are appended in tabular form. 



The plateau of the San Francisco peaks in its effect on tree life, P. Lowell 

 (Mill. Aiiicr. Gcoi/r. Soc, /// (WOi)), Xos. 5, pp. 2.',7-270. fujs. 10; 6, pp. 365- 

 S82, fii/s. JO). — ,A study of the zonal distribution of different trees in the San 

 Francisco region of the Colorado plateau. 



The author finds that the thinness of the air offers no obstacle to the tree's 

 growth. Slope exposure' has a decided influence on the maximum and mininiuni 

 altitude of a given species, and the mass of land at a given height also influences 

 zonal distribution. The grt>ater the land mass under them, the more uniform 

 are the tree zones in altitude. In the lower zones where the land mass is 

 greater, the tree zones actually rise on the north even against the effect of 

 slope exi)osure. This is attributed to a greater generation of warmth in the 

 large mass of plateau soil. 



Studies in Norway, H. Perrin (Rev. Eaux et Forets, Jf9 (1910), Xos. <), pp. 

 262-276, figs. 3; 10, pp. 289-303, figs. 13).— This comprises the results of a study 

 of silviculture and timber exploitation in Norway. The subject matter is dis- 

 cussed under the general headings of a general account of Norwegian forests, 

 their administration, forest legislation, etc., the species and stand, culture, 

 reforestation and management, exploitation, forest industries, and commerce. 



[The Russian timber industry], J. H. Snodgrass (Mo. Cons, and Trade 

 Rpt.s. [U. aS'.], 1910, No. 3.',7, pp. 75, 76).^Data are given on the forest wealth 

 and the lumbering industry in the Russian Empire. 



The coastal forests of Cameroon, M. BiJSGEN (Ztschr. Forst u. Jagdw., 42 

 {1910), No. 5, pp. 26.i-2S3, pi. 1, figs. 3).— A descriptive account of this forest 

 is given relative to its constitution, extent, species of economic value, and 

 similar points. 



Soil changes effected by afforesting impoverished farm lands, Fricke 

 (Ztschr. Forst ii. Jagdw.. .',2 {1910), No. 5, pp. 25.'y-J(;.'/).— Investigations of soils 

 taken frt)m impoverished farm lands which have been reforested with pine 

 trees lead the author to conclude that the first generation of trees is of little 

 value in adding humus to the soil for the use of the second generation of trees. 

 The soils studied were of a medium-grained quartz sand formation. The litter 

 deposited on the surface of the soil can only become of value to the succeed- 

 ing generation of trees by incorporation with the mineral soil through cultural 

 methods, which methods are generally out of the question in forest operations. 



Sowing or planting? I). Frombling (Forstw. Ccntbl., n. scr., 32 (1910). No. 

 5, pp. 253-271). — A discussion of the relative merits of establishing forests by 

 means of seed and by the use of nursery grown plants. 



[Tree planting and maintenance after planting], Herri ngton (Proc. N. Y. 

 Farmers, 1909-10, pp. 5-20, pis. 1.'/). — An address, with the accompanying dis- 

 cussion, delivered before the New York Farmers' Club in which consideration 

 IS given to the commercial methods of transi)lanting, i)lanting, and maintaining 

 large ornamental and forest trees, and also including a popular discussion of 

 the diseases of trees. 



The vitality of pine seed in serrotinous cones, J. C. Blumer (Torrcija, 10 

 (1910). No. 5, pp. lOS^III). — A (liscussion of this subject based on the observa- 

 tions of the author and other investigators. 



