No. 1, August, 1920] 



FORESTRY 



25 



170. Dakvey, Mason. Forest tree planting in Nelson District. New Zealand Jour. 

 Agric. 19: 297-299. 1919. — It is believed that Pinus m ignis and several species of Euca- 

 lyptus may be planted on land costing about $50 an acre as a very profitable long term 

 investment. — N. J. Giddings. 



177. Dawkins, C. G. E. Yemane (Gmelina arborea) in Upper Burma. Indian Forester 

 45:505-519. 1919. — The results of trials to introduce the yemane' into the forests of Burma are 

 given. Three methods have been tried ; broadcast sowing, dibbling and field planting. Notes 

 on the growth of plantations made are given. — E. N. Munns. 



178. De Jong, A. W. K. Tapproeven bij Hevea brasillensis. [Tapping experiments on 

 Hevea brasiliensis.] Arch. Rubbercult. Nederlandsch-Indie 3: 277-278. 1919. — Tapping a 

 quarter, a third or half the circumference of the tree with one left hand cut gave the follow- 

 ing results: 



For the first area tapped . . . 

 For the second area tapped 

 For the third area tapped . 

 For the three areas tapped. 



PROPORTION OF THE RCBBER YIELDS FOR 



179. Demorlaine, J. La necesitate d'un service forestier d'armee sous l'ancien regime. 

 [The need for an army forest service.] Rev. Eaux et Fordts 57: 229-230. 1919.— Dtjhamel du 

 Montceau, in 1764, in his "Exploitation des Bois," pointed out the need of attaching forest 

 officers to the engineers crops of the army in order to prevent the serious damage done to the 

 forests when the timber and other forest products needed by the army were secured by ordi- 

 nary soldiers without technical supervision. The need of an army forest service of this sort 

 has been strikingly demonstrated by the great war. Such a service should be autonomous, 

 with the same standing as the Engineer or Quartermaster Corps, and should direct the forma- 

 tion, management, instruction, and organization of companies of mobilized foresters. — S. T. 

 Dana. 



180. Descombes, Paul. Installation d'experiences prolongees sur le ruissellement. 

 [Protracted experiments upon stream-flow.] Mem. Soc. Sci. Phys. Nat. Bordeaux VII, 2: 

 17-35. 2 fig. 1918 —The author gives a brief r6sum6 of methods adopted by L'Association 

 Centrale pour l'Amenagement des Montagnes in studying the relations between precipitation 

 and stream-flow in the drainage basin of the Arises. An apparatus for automatically gauging 

 and recording changes in stream level is described. Data are presented to indicate a corre- 

 lation between changes in the flow of the Ariege (1896-1910) and the sylvo-pastoral conditions 

 in its drainage basin. — I. W. Bailey. 



181. Descombes, Paul. Le reboisement et le developpement economique de la France. 

 ; Reforestation and the economic development of France. M6m. Soc. Sci. Phys. Nat. Bor- 

 deaux VII, 2: 103-217. 2 fig. 1918.— Deforestation and over-grazing in the uplands of France 

 prevent an extensive substitution of waterpower for coal and are considered to be responsible 

 for the depopulation and degradation of these regions. Reforestation and other remedial 

 projects for improving the range have been combated by the mountaineers, who fear curtail- 

 ment of their herds and flocks. L'Association Centrale pour 1 Amenagement des Montagnes 

 has conducted a series of extensive experiments to prove that it is possible to prevent over- 

 grazing and to reforest the mountains without reducing the live stock of the mountaineers. 

 This is done by excluding from the alpine pastures migratory herds and flocks from the low- 

 lands. In considering measures for reforestation of both uplands and lowlands the author 



