107() EXPEKIMENT STATION EEOORD. 



beriiig operations serving to still further work the seed into tlie ground. The suc- 

 ceeding year the ground is heavily covered with a germination of oak and birch, the 

 latter coming in of its own accord. The birch acts as an excellent nurse crop, since 

 it grows faster than the oak and protects the oak seedlings from frost and sudden 

 evaporation. By the time the seedlings are 6 years old they form a complete cover 

 and very dense stand. At this time the poorly developed oaks are topped, the dead 

 ones removed, and the birches cut away. The subsequent growth of the oak trees is 

 looked after, and straight well-developed trunks secured by a continual pruning. At 

 the age of alwut 50 years the whole area is to be underplanted with beech or spruce 

 to protect the soil, and the oak allowed to develop as a high forest. 



The cultivation of the locust tree, L. R. Jones and \V. J. Morse ( Yeinuout Sto. 

 Rpt. 1902, pp. 339-243, fig. 1) . — The authors recommend for certain types of sterile 

 soil in Vermont the cultivation of the locust tree {Robinia pseudacacia) . In 1897, 

 100 seedling trees were set in rows 4 ft. apart each way. At 11 years old they aver- 

 aged 16 ft. in height and 5 in. in diameter. Encouraged by this small planting 5,000 

 more seedling trees were planted in 1902 and 92 per cent of the trees were alive at 

 the time of the report and making rapid growth. This planting was made at a total 

 expense of from $27 to |32 per acre. Estimates are made of the possible value of the 

 crop which it is believed at the twentieth year will be about $256 per acre. Sugges- 

 tions are given for planting, and where there is danger from attacks of insects mixed 

 plantations are recommended in which white and pitch pines, birch, elm and box- 

 elder are believed valuable. 



The black walnut, Li. O. Greene {Indmtrialbt, 39 {1903), Xo. 15, pp. 231-238).— 

 An account is given on the distribution and value of the black walnut, and notes are 

 given on the rate of growth of a number of trees of known age which have been 

 measured in different parts of Kansas. On account of the high price of walnut lum- 

 ber the author argues that the planting of black walnut trees could be made a profit- 

 able investment. 



Notes on Pseudotsuga glaucescens, G. Bellaik {Rev. Hvrt. \_Paris], 75 {1903), 

 No. 9, pp. 208, 209, figs. 2). — A description is given of Pseudotsuga ghtucescenn Avhich 

 is said to have been derived from the Douglas fir (P. dottglasii) but is held to be 

 sufficiently distinct to warrant its separation as a species. 



A research on the eucalypts, E. T. Baker and H. G. Smith {New South Wales, 

 Ihpt. Fid,. Inslr., Tedmolog. Jf».s., Tech. Education See. No. 13, 1902, pp. XI-\-295, 

 pis. 46, dgiii. 1) .—The results of an extended study of the genus Eucalyptus are given 

 in which the authors treat the systematic classification, hybridization, and evolution 

 of species, together with their description, and the essential oils produced by them. 

 The species described, of which there are more than 100, are grouped into 8 classes 

 based according to the chemical constitution of the oils contained in their leaves. 

 Special studies are reported on the different constituents of the oils, and the timber 

 and forest characteristics of the different species are briefly mentioned. 



A revisioir of the genus Eucalyptus, I, J. H. Maiden {Si/dney: Govt., 1903, pp. 

 48, pis. 4). — The author has Ijegun a critical revision of Ejucalyptus, which is' with- 

 out doubt the most important genus of forest trees in Australia. The general habits 

 of the trees are described and their value as timber as well as their economic pro- 

 duction is shown. The characters which have been used at different times to aid in 

 the classification of the species are mentioned, and a study reported of Eucalyptus 

 pilularis and E. pilularis muelleriana. These species are technically described, and 

 their characters as forest trees and the value of their timber shown. 



Progress in national forestry, J. S. Peyton {Forestry and Frrig., 9 {1903), No. 4, 

 pp. 194-197). — A review is given of the forest reserves in the United States and their 

 management. 



Recent forest reserve consolidation ( Forestri/ and Irng.,9 {1903), No. 2, p. 60). — 

 By Bresidential proclamation tlie Tetun, Yellowstone, and Absaroka forest reserves 



