250 FORESTRY [BoT. Absts., Vol. X, 



1652. Oliver, G. D. History of Sierra Nevada lumbering industry. Intercoll. Forest. 

 Club Ann. 1: 30-34. 1921. 



1653. Pearson, R. S. Note on the contraction of sal (Shorea robusta) timber while season- 

 ing. Indian Forest. 47: 245-247. 1 chart. 1921. — A section of green sal plank 1 inch thick 

 and 12 inches wide contracted 0.455 inches in width, the rate being fairly uniform and fol- 

 lowing the moisture content of the wood. During times pf high humidity the plank, expanded 

 slightly. — E. N. Munns. 



1654. QuAiRifeRE, C. J. L'arboretum de Gedinne. [The arboretum of Gedinne, Belgium.] 

 Bull. Soc. Centrale Forest. Belgique 24: 19-31. 1921. — The 2 genera Abies and Picea are 

 classified by species according to their reaction to the locality at Gedinne. Of the exotics 

 the species of Abies which made very good growth are A. grandis, A. balsamea, A. fraseri, 

 A. concolor, A. Veitchi, A. pectinata; of Picea the species which made good growth are P. 

 Sitchensis, P. omorika, P. bicolor. Other species of both genera fall into 2 lower classifi- 

 cations. The account is to be continued. — W. C. Lowdermilk. 



1655. R., E. Faut-il exploiter les pineraies ravagees par la nonne et la noctuelle dupin? 

 [Is it necessary to cut the pineries damaged by pine defoliators?] Bull. Soc. Centrale Forest. 

 Belgique 23:405-408. 1920. 



1656. Recknagel, A. B. Is forestry succeeding? Intercoll. Forest. Club Ann. 1: 11- 

 12. 1921. 



1657. RiNDL, M. Some sources of non-drying oils. South African Jour. Indust. 4: 641- 

 649. 1921, — The Bulletin of the Imperial Institute has published investigations of the oil 

 from Balanites Mangnamii, which abounds in Portuguese East Africa. The oil is said to 

 equal in value refined cotton seed oil. — The seed of Calodendron capense yields a pale yellow 

 oil, which would be suitable for soap making. — The seed of the baobab tree, Adamsonia 

 digitata, yield too little oil to render them commercially valuable. The oil from the Marula 

 nut, Sclerocarya caffra, would be suitable for soap manufacture and possibly for edible pur- 

 poses, but the low percentage of kernel in the fruit and the difficulty of cracking the nuts and 

 separating the kernels makes it unlikely that it will become commercially valuable. The 

 Cashew tree, Anacardium occidentale, flourishes in Portuguese East Africa and should grow 

 well in the more tropical districts of the Union. In view of its value as a substitute for al- 

 monds the cultivation of the Cashew nut holds considerable prospect of success. Oils derived 

 from Ximenia americana, X. caffra, and Telfairia pedata are also discussed. — E. M. Doidge. 



1658. RoESSLER. Das rheinische Wirtschaftsbuch als Teil des Betriebswerkes und der 

 Betriebskontrollen. [The Rhenish control book as a part of the management plan and the 

 management control.] Zeitschr. Forst- u. Jagdw. 51: 436-438. 1919. — The usual valuation 

 books, special cards, control books, etc., are not suited for use in the woods. The author 

 presents the outline of a management book copied, with minor improvements, from that of 

 the Rhenish communal forest administration, and recommends it to all forest managers — 

 /. Roeser. 



1659. ScHXAASE. Die formelle Behandlung der Betriebsregulierungen nach dem Kriege. 

 [The formal treatment of forest working plans after the war.] Zeitschr. Forst- u. Jagdw. 51: 

 98-103. 1919. — It is conservatively estimated that \ of all Prussian forest districts are in 

 need of new working plans, as post-war conditions make the preparation of plans under the 

 old instructions impossible. Therefore, temporary plans should be prepared to insure a 

 continued wood supply during the 1st period (approximately 20 years). Suggestions as to 

 vf&ys, and means of formulating and carrying out this work are included. — /. Roeser. 



1660. Schroder, H. Bodenriickgang unter Fichte. [Soil retrogression under Norway 

 spruce.] Zeitschr. Forst- u. Jagdw. 51: 439-^44. 1919.— The author investigated 2 small 

 areas planted to Norway spruce in 1840-1845 and since cleared. These were located on the 



