FORESTET. 747 



comprises a statistical review for the year 1911 relative to the yield in lumber 

 and minor forest products, receipts, expenditures, and net returns from the 

 state forests in the various districts of Saxony. 



Methods of identification of Philippine woods, E. E. Schiveideb (Philippine 

 Craftsman, 1 {1912), No. 6, pp. Jf66-Ji86, fii/s. 36).— In this paper the author 

 discusses the various elements to be observed in the study of wood sections for 

 the purpose of identification. Descriptions with several photographic illustra- 

 tions are then given of a large number of Philippine woods with reference to 

 their structure as seen in cross sections. 



The trees of Great Britain and Ireland, H. J. Elwes and A. Henry {Edin- 

 burgh, 1913, vol. 7, pp. VIII+1653-1933, pis. 42, figs. 2; Index, pp. XXIV+1935- 

 2022). — This is the seventh and last 2-part volume, together with a separate 

 index, of an extensive treatise on the trees which are native or cultivated in 

 Great Britain and Ireland (E. S. R., 28, p. 145). 



In part 1 the varieties and species of Tilia, Trachycarpus, Acanthopanax, 

 Acacia, Laurelia, Ilex, Buxus, Crataegus, Salix, Populus, Ulmus, and Koelreu- 

 teria ^re considered relative to their botany, distribution, and cultivation, as 

 well as the history and economic value of the more important forms. In many 

 instances specimen trees growing in Great Britain are described. 



Part 2 consists of illustrations and botanical drawings of the trees discussed 

 In part 1. 



In connection with the index a list is given of errata and addenda for the 

 entire work. 



Yield investigations in oak hig'h forests, Wimmenauer {AUg. Forst u. Ja<gd 

 Ztg., 89 (1913), Aug. pp. 261-267). — In the author's earlier investigations of 

 oali high forests on the Pvhine (E. S. R., 13, p. 753) volume and financial yield 

 and increment were considered in connection with crowded stands in which only 

 the suppressed trees were talien out. For several years observations have been 

 made on experimental areas on which the forests have been converted to the 

 open-stand system. As a result of these studies yield tables for oak high for- 

 ests of various qualities grown under the open-stand system are here presented, 

 together with a yield table for beech underwood based on a study of some 30 

 experimental areas. 



Investigations on the value of accretion of pine and spnice, Schwappach 

 (Ztschr. Forst u. Jagdw., 45 (1913), No. 8, pp. 496-502).— This comprises a 

 statistical study of the relation between volume and value accretion in increas- 

 ing aged pine and spruce stands. 



Plantation rubber in Hawaii, W. A. Anderson (Hawaii Sta. Press Bid. 44, 

 pp. 12). — In continuation of previous bulletins (E. S. R., 17, p. 566; 22, p. 645) 

 this summarizes recent observations and experiments dealing with the rubber 

 industry in Hawaii. 



Among the results in starting plantations it has been found that cuttings of 

 rubber plants have grown and yielded as well as seedlings under the same con- 

 ditions; hence it is concluded that propagation by selected cuttings from the 

 best yielding trees is the best means of extending the plantations, since it is 

 possible that the well-known variation in yielding capacity of different trees 

 may be largely eliminated thereby. When the plantation is started with seed- 

 lings, close planting followed by selective thinnings with a final spacing of about 

 20 by 20 ft. appears to be more advantageous than initial plantings of 20 by 

 20 ft. It is believed that a proper adjustment of the tapping system will tend to 

 reduce the necessary additional cost of tapping per acre caused by irregular 

 spacing to a negligible point as compared with the advantages of close planting. 

 In addition to the possibility of culling out low-yielding trees, close planting 

 covers the ground quickly with foliage, thereby reducing weeding expense and 



