FORESTRY. 839 



The natural reproduction of sal, R. S. Troup (Indian Forester, 42 {1916), No. 

 2, pp. 57-60). — Experiments conducted by the author show that in the open, 

 exposed to the sun, the seed of sal {Shorea robusta) falling on a layer of dead 

 leaves fails to germinate or, if it does germinate, perishes rapidly. Under 

 shade with complete protection from the sun the seed falling on a layer of 

 dead leaves germinates and the seedlings develop satisfactorily above ground 

 during the first rainy season. Relative to the root system, however, unless the 

 leaf layer is so scanty as to permit of the ready penetration of the taproot to 

 the mineral soil, the roots spread horizontally along the moist leaves and 

 perish in the ensuing dry season. These results suggest that the annual layer 

 of fresh dead leaves may be a highly adverse factor so far as natural repro- 

 duction is concerned. 



Anatomical investigations on the formation of annual rings of Tectona 

 grandis, F. Geiger {Jahrb. Wiss. Bot. [Pringshehn], 55 {1915), No. 4, pp. 521- 

 607, figs. 2S). — A study of annual ring formation of teak woods secured from dif- 

 ferent sections of east and west Java. Data are given and discussed showing 

 the variation in the formation and distribution of the elementary organs in 

 the different specimens, with special reference to structure in the region of 

 growth. 



A bibliography of related literature is appended. 



Reproduction of teak by root suckers, E. Marsden {Indian Forester, 42 

 {1916), No. 2, pp. 4-^-00, pis. 6). — Experiments reported by the author indicate 

 that the so-called root suckers of teak are really " stool shoots " and that true 

 root suckers are comparatively rare, these being usually confined to a few shoots 

 which originate near the head of the roots, close to the parent stem. 



Teak working plans in Burma, H. W. A. Watson {Indian Forester, 4^ 

 {1916), No. 1, pp. 4-1"^) • — IQ this article the author discusses the past working 

 plans and the probable trend of future working plans, including suggestions for 

 their development. 



An investigation relative to the most exact method of measuring teak 

 trees and teak stands, H. Beekman {Dept. Landb., Nijv. en Handel [Dutch 

 East Indies], Meded. Proefstat. Bosehio., No. 1 {1915), pp. VIII+93, pis. 20). — 

 This comprises a report on a comparative study of methods of estimating age, 

 diameter, height, and volume growth, with special reference to teak trees and 

 teak forests. The data secured are presented in a series of diagrams and tables 

 and fully discussed. 



The care and improvement of the woodlot, C. R. Tlllotson {U. S. Dept. 

 Agr. Fanners' Bui. 711 {1916), pp. 24, figs. 6). — This bulletin discusses the essen- 

 tials of a good woodlot and its improvement, care, and methods of regeneration. 



Marketing of woodlot products in Kentucky, W. D. Sterkett {Bien. Rpt. 

 State Forester Ky., 2 {1915), pp. 71-140, pis. 24).— In this paper the author 

 briefly surveys the woodlot situation in Kentucky ; gives an account of the wood- 

 lot regions, wood-using industries, and how the different species are used ; and 

 discusses the methods of increasing the profits from woodlot sales and of pre- 

 venting the deterioration of cut woodlot products. A directory of wood-using 

 firms is included. 



Utilization of southern wood waste, A. D. Little {Chem. Engin., 23 {1916), 

 No. 2, pp. 83-86) . — An address on this subject delivered before the eighth annual 

 meeting of the American Institute of Chemical Engineers in January, 1916, in 

 which the author gives special attention to the various methods of utilizing 

 wood waste in longleaf yellow pine. 



Wood flour, F. W. Kress jiann {Metallurg. and Chem. Engin., 14 {1916), No. 7, 

 pp. 372-374). — A discussion of the nature, properties, and uses of wood flour. 

 41852°— No. 9—16 i 



