144 FORESTEY [BoT. Absts., Vol. VIII, 



999. Anonymous. [Rev. of: Henry, A. Forests, woods, and trees in relation to hygiene. 

 xii + 314- P-, 28 illus., 21 maps and plans. Constable & Co.: London, 1919.] Sci. Prog. 15: 

 145-146. 1920. 



1000. Balsemao, E. de. Influencia das florestas na atmosfera. [Influence of the for- 

 ests on the atmosphere.] Bui. Agric. Nova Goa [Portuguese East India] 1: 152-157. 1919. — 

 Reprint of an article from Official Bull, of Portuguese India for 1883, and based on an article 

 in Revue des Deux Mondes. — /. A. Stevenson. 



1001. Barbour, W. R. Argentine and Paraguay forest conditions. Jour. Forestry 18: 

 823-830. 1920. — A brief description is given of the condition of the forest in Argentina and 

 Paraguay with some of the uses of the principal woods. The most important forest industry 

 of the region is the production of tannin from quebracho. Very little is being done for the 

 extension or practice of forestry, planting being mostly confined to the landscape garden and 

 windbreaks. — E. A . Munns. 



1002. Berger, Hans. Die Carl Heyersche Formel. [Carl Heyer's forumla.] Schweiz. 

 Zeitschr. Forstw. 71 : 290-296. 1 pi. 1920.— The author points out the discrepancy in Heuer's 

 formula when applied to other than normal and mature forests. The use of the average incre- 

 ment based on yield at time of cutting distributes the increment over periods of growth that 

 are not measurable on this basis. Comparisons with the Bade formula shows wide variat- 

 ions in a stand of 50 hectares 50 years old. The conclusion is reached that it would be 

 advisable to manage the forests with the application of less formula and more common 

 sense — /. B. Hofmann. 



1003. Berkhout, a. H. Das Messen der Baume hinsichtlich ihres Zuwachses. [Growth 

 measurements of trees.] Schweiz. Zeitschr. Forstw. 71 : 377-379. 1920. — A formula is worked 

 out on the basis of relation of diameter to cubic contents. Ten trees are selected in each 

 type. One group is in small, one in medium, and one in large trees. The average diameter 

 and cubic contents are obtained by careful measurement, and the average tree is used for 

 stand to be studied. If desirable, the trees measured may be remeasured at any time and 

 the annual or periodic increment may be obtained. It is recommended that the tree be 

 climbed and measured. — J. B. Hofmann. 



1004. Berkhout, A. H. Het meten der boomen in verband met hun aanwas. [The meas- 

 urement of trees in connection with their growth.] Mededeel. Landbouwhoogeschool Wagen- 

 ingen 17: 109-225. Fig. 16. 1920. — It is desirable in measuring lumber for forest calcu- 

 lations that the laws of probability be more generally used. A great number of examples are 

 given.—/. C. Th. Uphof. 



1005. Boas, I. H. Preservation of piling against marine borers. Australian Forest Jour. 

 3:315-316. 1920. — The advantages of protection by impregnation with preservatives over 

 protection by external coatings are discussed. The experience of American experts is also 

 summarized. — C. F. Korstian. 



1006. BooDT. De bebossching van Drente. [The forestation of Drente.] Tijdschr. 

 Nederland Heidemaatschappij 32 : 192-200. 1920. — The forestation of the province of Drente 

 (Netherlands) is most difficult. On clay-loam soils (1) Pinus laricio var. austriaca, or (2) 

 growing yellow lupines followed by Picea excelsa, are recommended. On the heather fields 

 Pinus sylvestris with oak and Picea excelsa are advisable. The former will form the main 

 growth whereas the latter and oak form the undergrowth. — J. C. Th. Uphof. 



1007. Borgmann. [Rev. of: Endies, M. Lehrbuch der Waldrechnung und Forststatik. 

 (Text-bookof forest valuation and statics.) Berlin, 1919.] Forst. Rundschau 21: 13. 1920. — 

 A short general notice of the third edition noting a few additions and changes. — F. S. Baker. 



