254 Forestry Quarterly 



next came the regular comb type, while the irregular comb type 

 was in decided minority, and the other two types also less promi- 

 nent. A comparison of the results shows the comb type decidedly 

 ahead of all other types in diameter, height and volume. 



The greatest diameter difference between this and the brush 

 type was nearly 13 per cent, or almost 2 inches, down to 4 per 

 cent. The average height was found to range between 10 per 

 cent (2.1 inches) and 2.9 per cent (.7 meter) in favor of the 

 comb type ; the volume between 9.5 and 39.4 per cent ahead of the 

 brush type. The difference is so great that any errors cannot 

 change the relation much. 



Comparing brush, band and flat types, it is found that the 

 first in general are more vigorous growers than the other two 

 types. 



The author finds that age has nothing to do with the percentic 

 distribution of the various types ; nor does the density of the stand 

 shift the difference, nor the soil. The branch habit is racial and 

 is heritable. The better development of the comb type also finds 

 expression in the greater number of this type in the forest, mostly 

 over 40 per cent. 



The author also observes that this type is most resistant to snow 

 pressure and to fungous disease. 



This investigation is another important step toward distinguish- 

 ing racial differences and making selection of seed material. 



A very full tabulation, pictures and diagrams accompany the 



article. 



Om kubikntassa och form has granar av olika forgreningstyp. Meddelanden 

 irkn Statens Skogsforsoksanstalt, vol. 11, 1914, pp. 9-60. 



Additional data to the discussion on the 

 Derivation question of the derivation of seed supply 



of are brought by Gunnar Schotte, of the 



Seed Swedish Experiment Station, as a result of 



trial plantings made in 1904 with pine seed 

 from various parts of Sweden. The experiments were first re- 

 ported in 1911 (briefed in F. Q., vol. IX, pp. 488 and 626). The 

 present measurements refer to the fall of 1914 to 11 years after 

 sowing. 



