No. 2, November, 1920] FORESTRY 81 



579. Koch, Elers. Discussion of the Pinchot Committee report. Jour. Forestry 18: 

 I. ">s -Kin. hl'ii. The plan nf the Pinchol Committee ie believed idealistic, and not Feasible. 

 The time is not ripe for such a program of foresl policy, but niicnl ion should be concent rated 

 on the fire problem, and forest-fire control by the states will go farther than national control 

 of lumbering. — E. N. Munns. 



580. Kobhler, A. [Rev. of: Wilson, T. R. C. Effect of kiln drying on the strength of 

 airplane parts. Rept. No. 68, Nation. Advisory Committee for Aeronautics. Washington, 

 D. C, 1920.1 Jour. Forestry 18: 421-423. 1920. 



5S1. Leopold, Aldo. Forestry of the prophets. Jour. Forestry 18: 412-419. 1920.- See 

 Bot. Absts. 6, Entry 940. 



5. Lowinger, Extgen. Polens Fortswirtschaft und Deutschland. [Poland's forestry 

 and Germany.) Deutsch. Forstzeitg. 35: 195. 1920. — In order to import needed materials 

 Poland musl export raw material, particularly forest products. The Polish government is 

 encouraging cutting of timber for this purpose as well as to supply home needs, and is backing 

 a large private sawmill company which is to saw lumber for home and foreign trade. A 15,000 

 hectare tract of virgin forest in the province of Grodno has been made available for exploita- 

 tion. — W. -N. Sparhawk. 



583. Ludwig. Gewinnung von Gerbrinden mittels Dampfschalung. [Use of steam in 

 harvesting tan-bark. | Forstwiss. Centralbl. 41 : 401 404. 1919. — Scarcity of tanning material 

 during the war led to the discovery that not only oak bark, but even that of spruce, is of 

 great value for tanning. The use of domestic products will continue, as far as possible, 

 because of high prices for quebracho, high freight rates, and unfavorable financial exchange. 

 Harvesting of bark has heretofore been possible only between May and July or August. Ex- 

 periments have shown that bark can be removed at any time by the use of steam, very much 

 more cheaply than in the old way and without impairing its value. Guts chow invented a 

 portable steaming and drying apparatus that could be taken into the woods. Oak bark, 

 usually directly used, must be thoroughly dried; spruce bark is more often extracted 'and only 

 a little drying is required. Less steaming is required if the bolts are steamed while green, and 

 there is also less loss of tannin due to weathering. The use of spruce bark for tanning has 

 special significance for the paper and pulp industry, since the bark has to be removed for 

 pulp making and has not hitherto been utilized. It can now be sold as tanning material, for 

 enough to pay the cost of removal and give a good profit besides. — W. N. Sparhawk. 



584. MacLarty, Alexander S. Forest tree seed. Trans. Roy. Scot. Arbor. Soc. 33: 

 138-146. 1919. — This paper discusses several points which should be given consideration in 

 the collection of forest tree seed. — C. R. Tillotson. 



585. Makins, F. K. Natural reproduction of sal, Shorea robusta, in Singhbhum. Indian 

 Forester 46: 292-297. PI. 16-18. 1920. — Sal reproduction is satisfacl >ry where drought is not 

 severe, but much of the region considered has long periods of dry weather; only about 20 per 

 cent of the forest area has reproduction. Deposition and evaporation of dew have an impor- 

 tant influence on sal. Heavy shade appears to be a benefit but heavy litter prevents estab- 

 lishment. Young sal plants require assistance in making their way through climbing plants, 

 while non-climbers act as a nurse crop. A grass cover does not prevent sal establishment 

 though better results are obtained after burning. — E. N. Munns. 



586. Mason, Fred. Discussion of the Pinchot Committee report. Jour. Forestry 18: 

 451-458. 1920. — Exception is taken to the Committee's attitude towards the lumbermen, who 

 are not to blame for the living conditions and the labor troubles within the industry. Forest 

 destruction by the lumber interests is not a needless act, but is forced by economic conditions. 

 Finances in the lumber industry have been so entangled that conservation could not be prac- 

 ticed, though some measures have been forced upon them. Measures which are feasible 

 include a yield tax, a forest loan board, and the purchase of forest-producing lands by the 

 public. An educational program is suggested to teach lumber conservation in all phases of 

 its use. — E. N. Munns. 



