1918] FORESTRY. 46 



have been planted at different periods since 1909. A list is also given of shrubs 

 recommended for ornamental plantings. 



Annual report of the director of forestry of the Philippine Islands for the 

 fiscal year ended December 31, 1916, A. F. Fischeb {Ann. Rpt. Dir. Forestry 

 P. I., 1916, pp. 83). — This is the usual report relative to the administration, in- 

 vestigation, management, reconnoissance, and miscellaneous work for the year 

 ended December 31, 1916. Data showing homestead and timber licenses, utiliza- 

 tion of forest products from public forests, timber cut, exports and imports, 

 revenues and expenditures are appended. 



Some factors influencing the reproduction of red spruce, balsam fir, and 

 white pine, B. Moore (Jour. Forestry, 15 (1911), No. 7, pp. 827-853, figs. 4). — 

 The investigation here reported was conducted on Mount Desert Island, Me., 

 with the view of determining the factors governing the reproduction of the more 

 important coniferous trees of northern New England. 



Choosing the best tree seeds, C. J. Kbaebel (Jour. Heredity, 8 (1917), No. 

 11, pp. 4S5-492, figs. 6). — In this article the author describes a study of Doug- 

 las fir seed which is being carried out at the Wind River Experiment Station, 

 near Carson, Wash. The subject matter is based largely on a previous progress 

 report of the experiment by Willis and Hofmann (E. S. R., 33, p. 739). 



A bibliography of literature dealing with the influence of the source of seed 

 on trees is included. 



Utilization and reforesting of chestnut blighted lands, L, O. Barnes (Jour. 

 Forestry, 15 (1917), No. 7, pp. 854-858). — This paper is based on reforestation 

 work conducted on the Nittany State Forest in Pennsylvania. 



Accelerated growth of spruce after cutting in the Adirondacks, A. B. 

 Recknagel (Jour. Forestry, 15 (1917), No. 7, pp. 896-898). — Some measure- 

 ments showing increased growth after thinnings made by the Cornell depart- 

 ment of forestry on a forest tract in St. Lawrence County, N. Y., are here 

 presented. 



Note on babul (Acacia arabica), J. D. M. Kjbwan ([Indian} Forest Bui. SS 

 (1917), pp. lJt> pl- 1). — A descriptive account of this tree, which is indigenous 

 to several sections of India, including an actual specimen section of the wood. 



The ohia lehua trees of Hawaii, J. F. Rock (Bd. Agr. and Forestry Hawaii, 

 Div. Forestry Bot. Bui. 4 (1917), pp. 76, fi.gs. 36). — A revision of the Hawaiian 

 species of the genus Metrosideros, with special reference to the varieties and 

 forms of Metrosideros coUina. 



Variations among eucalypts in plantations, L. Tbabut (Bui. Sta. Forest. 

 Nord Afrique, 1 (1917), No. 5, pp. 140-155, pis. 6, figs. 6). — A discussion of 

 variant forms of Eucalyptus, including descriptions of some hybrids observed 

 principally in Algeria. 



Ray tracheids in Quercus alba, S. J. Record (Boi. Oaz., 64 (1917), No. 5, p. 

 437, fig. 1). — In this note the author calls attention to the presence of ray 

 tracheids in the wood of Q. alba. It is believed that this is the first record 

 of the occurrence of ray tracheids in the woods of the dicotyledons. 



Measurements of " bark renewal " in Hevea, L. E. Campbell (Dept. Agr. 

 Ceylon Bui. 33 (1917), pp. 24)- — In continuation of previous studies of tapping 

 systems in relation to the physiological processes of the rubber tree (E. S. R., 

 34, p. 47), certain conclusions relative to the effects of various types of tapping 

 on the rapidity of cortex renewal are here presented. 



Trees tapped daily throughout the year resulted in poor cortex renewal as 

 compared with trees tapped on alternate days and every third day. Grood first 

 renewals were shown by trees tapped by two cuts on one quarter, one cut 

 sloping upward to the left on one half, and two V cuts on one half. 



