April, 1920] GENETICS 141 



ing British Columbia trees. — There are three interesting chapters dealing in broad aspects 

 with the effect of geographical, physiological and climatic and soil relations on occurrence 

 of forests and forest types, their economic importance and utilization, and on forest fires. — 

 The chapter on land tenure describes the salient features of the various forms of tenure, and 

 their relationship to forest administration, including timber leases and timber sales. Chap- 

 ters on forest administration on Provincial and Dominion Land describe the workings of for- 

 estry regulations and revenue secured on these two general classes of land. — A chapter on 

 forest policy draws attention to a few points not sufficiently covered in preceding chapters, 

 including the subjects of forest revenues, and of the need for scientific forest research and for 

 a college of forestry. — A chapter of forest exploitation describes the development of the 

 lumber industry in British Columbia, methods and costs of logging, amount of timber cut in 

 various years, logging regulations and stumpage values. The largest reported lumber cut 

 is for the year 1911, when 1342 million feet were cut. The State of Washington cut over 4000 

 million in the same year. — The report forms an encyclopedia of information on forest condi- 

 tions and forest resources of British Columbia and gives an excellent basis for developing a 

 permanent forest policy for the Province. — W . D. Slerrett. 



969. Wilson, Ernest Henry. A summary report on the forests, forest trees, and afforest- 

 ation in Chosen (Korea). Trans. Roy. Scottish Arboric. Soc. 33: 44-51. 1919. — The forests 

 of Chosen are divisible into three groups: (1) Forests of conifers, (2) Forests of hardwood 

 trees, (3) Mixed forests of conifers and hardwood trees. The softwoods include spruce, 

 larch, fir, yew, pine and juniper; the hardwoods walnut, birch, oak, ash, chestnut, popular, 

 basswood, and some others. — Forests of Tohi, Chosen, Hari-momi, Toshirabe, Chosen-matsu, 

 and Chosen Kara-matsu, mixed or more or less pure, cover vast areas on the mountains in 

 the extreme north of Chosen. The Chosen Kara-matsu is found only on volcanic soils in 

 north-eastern Chosen, and especially on the Chang-paisan range of mountains, where it covers 

 large areas and forms extensive forests, often quite pure. The Aka-matsu (Pinus densiflora) 

 is found from the extreme south to the extreme north of Chosen, mixed with hardwood trees 

 or forming pure woods. The other softwood trees are widely scattered through Chosen. The 

 remains of forests of hardwood trees occur here and there throughout the length and breadth 

 of Chosen, but extensive forests of these trees grow chiefly on the mountains of the Unsan 

 district, and on the coastal ranges of south and north Kankyo. — If properly conserved these 

 forests are capable of supplying in perpetuity vast quantities of useful timber, and of being 

 a perpetual source of national revenue. — Natural renewal of some of the forests may be 

 effected if the seed trees are left in lumbering operations. This is the most simple and econom- 

 ical method in the hardwood forests and in some of the coniferous forests. It is claimed that 

 regeneration of the forests of Chosen Kara-matsu (Larix dahurica, var. Principis-Rup- 

 prechtii) may be readily effected if the under growth be burned over some years before the 

 forests are cut down. The planting of Pinus densiflora promises to be the most successful 

 work in reafforestation yet attempted in Chosen. This tree will grow on the most barren 

 of soils. To reforest the vast areas of mountain land in Chosen, now covered with coarse 

 grass and low shrubs, it is suggested that these be severely burned over and afterwards thickly 

 sown with the seed of several species of birch and with larch, all mixed together. — C. R. Til- 

 lotson. 



970. Woodward, Karl W. [Rev. of: Huffel, G. Les ressources realisables des forets 

 Allemandes. [The available resources of German forests.] 15 p. Paris, 1918.] Jour. For- 

 estry 17: 430-431. 1919. 



GENETICS 



George H. Skull, Editor 



971. Anonymous. [Rev. of: William Brierley. An albino mutant of Botrytis cinerea. 

 Given before the Linnaean Society.] Jour. Bot. 57: 135-136. 1919. 



972. Anonymous. Develops new hybrid cowpeas. Jour. Heredity 10: 175. April, 1919. 

 — A brief report of the progress of the work with cowpeas of the United States Department 

 of Agriculture, quoted from the Weekly News Letter. — M. J. Dorsey. 



