156 GENETICS [BoT. Absts., Vol. X, 



in spruce amounting to as much as 40 cm. per year, whereas on the untreated areas it averaged 

 hardly 1 cm. of poor, yellowish growth. Lupine flowers within 3 years and begins to reseed the 

 area. Under these conditions there is little danger of choking the spruce. On areas recently 

 cut over without removal of litter, development is much more rapid; large spruce stock must 

 be used and some of the lupine plants too close to the spruce sometimes destroyed. On such 

 sites seed should not be sown close to the spruce. Reference is made to an article by Fric on 

 the same subject (Ceskoslovensky Lesnik Nos. 37-38) which discusses lupine culture under 

 Ruzlcka at Miilhausen. — F. S. Baker. 



1025. TscHERMAK. Die Forstverwaltungsbucherei. [The forester's book shelf.] Wiener 

 Allg. Forst- u. Jagdzeitg. 39: 111-112. 1921. — This article consists of a list of standard (Ger- 

 man) books on different phases of forestry and lumbering, with a short description of the char- 

 acter of each. — F. S. Baker. 



1026. Valencia, F. V. Mechanical test of some commerical Philippine timbers. Philip- 

 pine Jour. Sci. 18:485-533. PI. l,fig. 1-19. 1921. — This preliminary paper gives data collected 

 by the Bureau of Science [P. I.] in cooperation with theBureau of Forestry [P. I.], serving as a 

 comparison of species as well as the establishment of working stresses. Tests were made of 

 structural timbers and also of small specimens free from defects. — Albert R. Sweetser. 



1027. WoRLiczEK, C. Betrachtung iiber die Ertragnisse der Staatsforste. [The yield of 

 the state forests.] Wiener Allg. Forst- u. Jagdzeitg. 39: 105-106. 1921. — The statistics on the 

 yield of the state forests of Austria from 1876 to 1920 are discussed showing some of the causes 

 of variation. In general the production is showing a rising trend in relation to the total pro- 

 duction of the country. — F. S. Baker. 



GENETICS 



George H. Shull, Editor 

 James P. Kelly, Assistant Editor 



(See also in this issue Entries 872, 886, 910, 911, 916, 923, 1132, 1136, 1187, 1191, 1195, 



1370, 1392) 



1028. Anonymous. An experimental determination of the probable error of Dr. Spearman's 

 correlation coefficients. Biometrika 13 : 263-282. 1921. — When the unit of grouping is small 

 the product-moment method should be used, however small the sample. When one or both 

 variables can be ranked but not scaled, Spearman's P is the natural method. In such cases 

 it should be borne in mind that for small samples the mean, even of rp, is lower than that of 

 r, and the a greater. It is not necessary to determine R and rR in serious work. — John Rice 

 Miner. 



1029. Anonymous. Hereditary trades. Jour. Heredity 11: 363. 1 fig. 1920.— The 

 custom is noted of Italian agricultural workers, especially those of the Roman Compagna, to 

 specialize as families in the occupations of reapers, sowers, vine-trimmers, etc. — Howard J. 

 Banker. 



1030. Anonymous. Meeting of geneticists interested in agriculture. Jour. Heredity 11: 

 384. 1920. — A brief account is given of a meeting held in Chicago, Dec. 28, 1921, attended 

 largely by geneticists connected with the agricultural colleges and experiment stations of the 

 U. S. A. A resolution was adopted favoring administratively independent departments of 

 genetics to give the courses of instruction and direct the investigational work. It is believed 

 this will help to simplify administration, prevent duplication, and give proper standing to the 

 subject of genetics in the curriculum. — Leon J. Cole. 



1031. Anonymous. Moral qualities and eugenics. Jour. Heredity 11: 189. 1920. — A 

 brief comment is made on the significance of mental and moral correlations suggested by the 

 publication of the results of psychological tests in the American Army. — Howard J . Banker. 



