FORESTRY. 45 



The natural pine forests on the Ulea River, North Central Finland, M. P. 

 Price (Quart. Jour. Forestry, 3 {1909), Xo. 4, pi). 311-820, pis. ^).— This is a 

 brief descriptive account relative to the conditions under which these forests 

 flourish, the silvicultural methods employed in their management, and the 

 economics of their conversion into knnber. 



Experiment with seed of Pinus sylvestris, F. Story {Quart. Jour. Forestry, 

 3 {1909), Xo. J, pp. 326-329). — The comi)arative merits of Scots pine seed from 

 different countries is being tested by various experiment stations in Europe, the 

 seed having been previously husked and cleaned at the Eberswalde Station, from 

 whence it was distributed to the different countries. A record is here given of 

 the work conducted at the University College of North Wales, and showing the 

 number and average height of 2-year-old seedlings obtained from the seed of 

 various countries. 



Commercial importance of the White Mountain forests, P. W. Ayres ( U. 8. 

 Dept. Agr.. Forest Serv. Circ. 168, pp. 32, map 1). — In this circular data are 

 given and discussed showing the importance of the White Mountain forests as a 

 source of timber supply, tlieir need of protection from fire, as an influence on 

 water power and on navigation, and as a place of health and recreation. 



Forest conditions in the Crow's Nest Valley, Alberta, H. R. Macmillan 

 (Dept. Int. Canada, Forestry Branch Bui. 5, pp. 22, pis. 12, maps 2). — This 

 bulletin comprises the results of a study of the Crow's Nest Valley, which region 

 is believed to be for the most part typical and representative of the eastern slope 

 of the Canadian Rockies. Consideration Is given to the topography, soils, eleva- 

 tion and the original forest on this area, and the present conditions are dis- 

 cussed relative to the condition of the timber lands, lumbering and mining 

 operations, and agricultural possibilities. A number of measurements are also 

 given, showing the rate of growth of Engelmann spruce, lodgepole pine, and 

 Douglas fir. The report concludes with suggestions for the reforestation and 

 management of the area. 



The forest trees of Canada (Canad. Forestry Jour., 5 (1909), Xo. 3, pp. 130- 

 136). — A list is given of some 141 species of trees native to Canada, including 

 their common and botanical names and geographic distribution. 



Report of the superintendent of forestry, R. H. Campbell (Rpt. Supt. For- 

 estry Canada, 1909, pp. 96, pis. 13). — This consists of a general report of the 

 work of the forestry and irrigation branch of the Canadian Department of the 

 Interior for the year 1908-9, and of the reports of the officials in charge of the 

 different divisions of the work. 



Resistant eucalypts for planting in southern Arizona, J. J. Thornbeb 

 (Arizona Sta. Bui. 60. pp. J/ 11-'/ 17, figs. 2). — Notes are given on several species 

 of eucalypts recouunended for planting in southern Arizona. 



[Rubber investigations at the Hawaii Station], E. V. Wilcox (Haicaii Sta. 

 Rpt. 1908, p. 11). — The chief results from the rubber investigations of the 

 year have been previously published (E. S. R., 20, p. 245). 



Experiments in planting Hevea rubber seeds indicated that they germi- 

 nated and grew best when the shells were previously removed and the seeds 

 planted in clean sand. The herring-bone system of tapping Ceara rubber trees 

 gave quite favorable results, as many as .30 consecutive tappings being made by 

 excising a thin slice of bark from the old wound. A good flow of latex was ob- 

 tained during the whole period. The use of a water bag, or an ammonia bag, 

 was found to increase the relative amount of first-grade rubber as compared 

 with scrap rubber. Some difficulty experienced in coagulating the latex was 

 overcome by the addition of hydrogen peroxid and sulphuric acid. Consider- 

 able difference was noted in the amount of latex obtained from yearling trees, 



