No. 1, August, 1921] FORESTRY 25 



of young growth at 0.5-G m. above ground cast suspicion on the mouse, known to be a good 

 climber. — Burrows and trails were common under the injured trees, but few cut tips could be 

 found. Direct observations and trapping in the trees demonstrated the above named mouse 

 to be the cause of the damage. — J. V. Ilofmann. 



167. Jacob, W. R. Le G. Report on forest administration in the Andamans for 1918-19. 

 4S p. Calcutta, 1920. — The usual annual report with summarized statistical data. There 

 is included a condensed statement covering the preceding 5-year period. In the South Di- 

 vision the surplus at the close of the j^ear was 552,598 Rs., or 5G.8 per cent of the revehues. This 

 amount is offset by a deficit of 1(>9,G77 Rs. in the North Division, as the latter was organized 

 during the year and timber extraction was not begun. A survey on 2-inch scale of the remain- 

 der of the forests of the North and Middle Andamans is required immediately, as timber 

 utilization is about to begin. Considerable damage was done to rubber trees and seedlings 

 in nurseries by heavy winds in June, 1918. Development of the forests, especially those of 

 the North Andaman, necessitates a great increase in the staff, as regeneration of areas follow- 

 ing clear cutting will require a large amount of trained supervision. — E. R. Hodson. 



168. JucHT. Naturverjiingung im Diirrnbucherforst. [Natural reproduction.] Forst- 

 wiss. Centralbl. 42: 402—404. 1920. — This pine and spruce forest (in Bavaria) had been man- 

 aged on a system of clear cutting foUow-ed by artificial seeding; results were not satisfactory. 

 In 1911 natural regeneration was decided on and secured by using a modification of Wagxeb's 

 border-cutting method, and preparing the soil in advance of the preparatory cutting by re- 

 moving most of the living soil cover as well as some of the dead litter in case much of the latter 

 was present. — W. N. Sparhawk. 



169. JuNACK. Weder Bodenreinertragswirtschaft noch Waldreinertragswirtschaft. [Soil 

 rent and forest rent.] Zeitschr. Forst- u. Jagdw. 52: 166-168. 1920.— A review of the 

 forest-rent and soil-rent controversy.- — Joseph S. Illick. 



170. Katzer. Grundlinien einer neuen Forst-Wirtschaftsphilosophie. [A new forestry 

 point of view.] Allg. Forst- u. Jagdzeitg. 96: 16-17. 1920. — The author discusses some of the 

 fundamental principles of forestry and presents a rational scheme of coordinating all branches 

 of forestry. — Joseph S. Illick. 



♦171. Kent, H. T. M. Report on the results of mechanical tests carried out on some Mala- 

 yan timbers. 9 p. Government Press: Kuala Lumpur, 1920. — Dry weight, elastic limit, 

 modulus of elasticity, and modulus of rupture of the timbers of 55 species of Malayan trees. — 

 /. H. Burkill. 



172. Kindle, E.M. Mackenzie River driftwood. Geog. Rev. 11:50-53. 1921.— Driftwood 

 is a familiar feature on the shores of arctic America. Dr. Fredrik Ingvarson (Die Triebhol- 

 zer auf dem EUesmere-Land, Rcpt. of the second Norwegian Arctic Expedition in the Fram, 

 1898-1902, Vol. 3, No. 24, p. 1-57, Christiania, 1911) recognizes 3 main sources of drift- 

 wood: (1) the Yenisei and Lena rivers of Siberia, (2) the St. Lawrence, and (3) the coast of 

 Norway. He does not mention the Mackenzie river, which Kindle considers second only to 

 the Siberian rivers as a source of arctic coast driftwood. The ^Mackenzie river, although a 

 great carrier of driftwood, is not itself a great producer. The supply comes mainly from its 

 western tributaries, of which the Gravel and the Peele contribute large quantities; but the 

 great bulk comes from the Liard river. In 1919 the vanguard of the main volume of the 

 Liard driftwood reached Old Fort Good Hope on the lower Mackenzie about July 13. The 

 writer reports that the immense volume of this floating mass of forest debris greatly exceeded 

 anything previousl}^ seen or imagined. In general it formed a nearly continuous mass \ 

 mile or more in width and in this closely packed condition occupied about 4 days in passing 

 a given point. Spruce and poplar comprise the great bulk of the ?*Iackenzie driftwood. 

 "Here indeed is a mammoth supply of pulpwood delivered at tidewater, cutting and transpor- 

 tation free, that merits the consideration of an}' enterprising paper company which can 



