146 EXPERIMENT STATION EECORD. 



unfavorable soil contlitious. The factors which create unfavorable conditions 

 for reproduction are then examined and the results obtained in his investiga- 

 tions are reviewed. The failure of the firs to reproduce appears to be brought 

 about by the souring and packing of the germinating bed. These conditions are 

 to a great extent due to lack of hunuis in the soils, such soils being usually 

 too cold ;uid droughty for satisfactory germination purposes. 



Fertilizer experiments with forest trees, Kuhnert (Deut. Landw. Presse, 

 36 (1909), No. 82, pp. 818, 819, figs. //). — The results are given of commercial 

 fertilizer experiments conducted in several forests in Schleswig-Holstein. The 

 work included both deciduous and coniferous trees, and the results as a whole 

 show the superiority of a complete fertilizer over the use of individual elements. 



In one experiment with oak trees, started in 1903, the trees on the complete 

 fertilizer plat were at the end of 5 years double the size of the trees on the 

 plats receiving only partial fertilizer. 



On the thinning of thick beech regenerations and beech seedings, D. Tie- 

 MANN (Allg. Forst. v. Jagd Ztg., 85 {1909), pp. 368-31^). — Suggestions are 

 given relative to methods of carrying on experimental thinnings in young 

 beech stands. 



Cooperative experiments in forest planting, F. J. Phillips (Nebraska 8ta. 

 Circ. 1, pp. Jf). — In this circular the author discusses the present attitude 

 toward forestry in Nebraska, points out the need of experimental work and 

 cooperation, and explains the nature of cooperative experiments which the sta- 

 tion proposes to take up with interested farmers. 



Our national parks, J. Mum (Boston and New York, 1909, rev. and e^nl. ed., 

 pp. 382, pis. 31, map 1). — The present edition of this work has been revised and 

 enlarged to include more recently established national parks and forest reser- 

 vations. The successive chapters discuss wild parks and forest reservations 

 of the West, the Yellowstone National Park, the Yosemite National Park and 

 its forests, wild gardens, animals, birds, fountains and streams, the Sequoia and 

 General Grant National Parks, and the American forests. The appendix con- 

 tains information relative to the location, area, and control of national parks 

 and monuments. 



Forest reservation in Burma in the interests of an endangered water supply, 

 A. EoDGER ( [Indian Forest Dept.] Pamphlet 6, Sylvicult. Ser. 2, pp. 2Jf, pis. 3, 

 map 1 ) . — A progress report of forest reservation work under way in the 

 Natmauk township of the Magwe district, Burma. The report includes a gen- 

 eral description of the tract, specific descriptions of the forests, and details 

 of the work for 1907-8. An appendix contains a list of species found in the 

 township. 



The selection system in Indian forests as exemplified in working-plans 

 based on this system, with a short description of some continental methods, 

 A. M. F. Caccia (Indian Forest Rec, 1 (1909), No. .',, pp. 309-//i7).— The pur- 

 pose of this monograph is to present in concise form the different methods 

 which have sprung up in the various provinces of India, to contrast these 

 methods, and to indicate the advisability of adopting a standard system for 

 the calculation of the possibility by the number of trees and by the volumetric 

 methods, respectively. 



Commercial aspects of the forests of the Dominican Republic, K. W. Wood- 

 ward (Bui. Internat. Bur. Anier. Repuh. [English Sect.'], 29 (1909), No. 5, 

 pp. 91.'t-92Jt, figs. 6). — In addition to export statistics of various timbers for 

 1907-8, an account is given of the timbered areas in Dominica, together with 

 lists of trees growing in the different areas. 



