No. 3, October, 1921] FORESTRY 191 



(Sperbelgraben and Rappengraben), and points out several weak points in the way the 

 project was carried out; for instance, (1) the 2 areas were in several respects not entirely 

 comparable, and (2) the lack of satisfactory records of the actual amount of precipitation 

 on the experimental areas. He does not feel entirely convinced by Engler's figures, but be- 

 lieves that no amount of exact measurement can absolutely solve the question of the relation 

 between forests and water. — 11'. N . Sparhawk. 



1233. Fabricitjs. [Rev. of: Bertog, Hermann. Die Beschaffung des Kiefernsamens 

 insbesondere seine Selbstgewinnung. [The gathering of pine seed.] 124 P-, 8 fig. J. 

 Neumann: Ncudamm, 1920.] Forstwiss. Centralbl. 43: 71-72. 1921. — This book, based 

 on the results of research by Cieslar, Schott, Engler, Kienitz, Haack, and Dengler, 

 is written especially for private foresters and forest owners. It brings out very clearly the 

 desirability of collecting one's own seed, instead of relying on seedsmen, both because of the 

 uncertainty as to origin of commercial seed, and because such seed may have been handled 

 in such a way as to seriously affect its quality. Figures are given to show that self-collected 

 seed costs much less than that obtained from dealers. — W. N . Sparhawk. 



1234. Fabricius. [Rev. of: Borgmann, Wilhelm. Die Begriindung und Erziehung 

 von Holzbestanden. [Formation and tending of timber stands.] 215 p., 35 fig. Paul Parey: 

 Berlin, 1920.] Forstwiss. Centralbl. 43: 27-29. 1921.— The book is not a text book on silvi- 

 culture, but is an excellent popular treatise for the use of forest owners who are not technically 

 trained in forestry. — W. N. Sparhawk. 



1235. Fabricius. [Rev. of: Solla, R. E. Holzgev/achse zur Winterszeit, Anleitung 

 zum Bestimmen entlaubter Holzgewachse. [Woody plants in v/inter. Guide for the identi- 

 fication of woody plants in the absence of their leaves.] 42 p., 50 fig. Theodor Fischer: Frei- 

 burg i. Br., 1920.] Forstwiss Centralbl. 43: 79. 1921. — The book is simple and usable, and 

 contains keys for the identification of 56 species of deciduous trees and SO species of shrubs 

 of central and southern Europe. — W . N . Sparhawk, 



1236. Fabricius. [Rev. of: Wiebecke, von. Der Dauerwald in 16 Fragen und Ant- 

 worten fiir den Gebrauch im Walde. (The "continuous forest.") Stettin.] Forstwiss 

 Centralbl. 43 : 195-198. 1921. — Von Wiebecke's "Dauerwald" is the same silvicultural system 

 as that used by von Kalitsch in Barenthorn. In spite of all the claims made for it, Fabricius 

 points out that it has certain disadvantages as compared with the clear cutting systems, and 

 that it is essentially only a selection system under a new name. — W. N . Sparhawk. 



1237. Fabricius. [Rev. of: Wild a, Hermann. Das Holz, Aufbau, Eigenschaften und 

 Verwendung. (Wood, its structure, properties, and use.) 154 p., 109 fig. Walter de Gruyter 

 & Co.: Berlin and Leipzig, 1920.] Forstwiss. Centralbl. 43: 190-191. 1921.— This book at- 

 tempts to give in a form adapted for popular use all the essential facts about wood and its 

 uses. In attempting to condense the material, the author has sacrificed much in the way of 

 completeness and accuracy, especially on the scientific side. — W. N . Sparhawk. 



1238. Fries, Thore C. E. Bjorkskogsgransens hojdlage inom TromsS Amt. [Upper 

 limit of birch in Tromso district, Norway.] Tiddsskr. Skogbr. 29: 48-72, 1921. — An examina- 

 tion of the causes in the variation of the upper limit of birch, Betula odorata, at the northern 

 limit of its distribution. — J. A. Larsen. 



1239. Frost, S. Forestry from the air. Amer. Forestry 27: 27S-2S0. 2 fig. 1921.— 

 The author concerns himself with the use of airplanes in forest mapping, reconnaissance, and 

 other operations in a Canadian forest.— CAas. //. Otis. 



1240. GoossENS, ^I. Notes sur un peuplement de parasoliers aux environs de Ganda- 

 Sundi. [Note on a parasol tree association in the neighborhood of Ganda-Sundi.] Bull. Agric. 

 Congo Beige 11: 74-79. Fig. 17-18. 1920. — The parasol tree {Musanga Smilhii) grows very 



