NOTES -'''1 



lupin. The plot with lupin showed better growth than the one without 

 lupin. Ten years after planting (1911), the trees in the lupin plot were 

 1.63 meters high against a height of only 1.02 meters for those in the 

 plot without lupin ; both lateral branches and needles of the former 

 were longer than those of the second plot. These differences were con- 

 firmed during the period 1911-1916. — K. Nmvratil, Centralblatt fiir das 

 (jesante Forsturscn. 



The recently completed study of climatic control of forest types made 

 imder the auspices of the Experiment Station in Missoula claims to 

 have found that the different forest types are confined to regions with 

 given summer temperature and given annual precipitation, and that the 

 excess or deficiency of either become limiting factors. On the basis 

 of this study yellow-pine forests require a summer mean of from 60 to 

 65 degrees and rainfall of from 14 to 19 inches per year. Lodgepole 

 pine-Douglas-fir forests require a summer mean of but 54 degrees ; 

 western white pine and larch-Douglas fir a little less. Prairies result 

 whenever the yearly downpour falls below 14 inches, regardless of the 

 temperature. The western white-pine region has a lower July and Au- 

 gust rainfall and humidity and greater amount of sunshine than any 

 other section of the district. This probably explains why fires become 

 more dangerous here than elsewhere in the latter part of the summer. 

 A more luxuriant vegetation is also found here. The study seems to 

 bring out clearly that the three east and west District sections have 

 their own distinct rainfall type. The type west of the Bitterroots shows 

 a Jamiary and Xovember high precipitation characteristic of the Pacific 

 Coast type, but also a high precipitation in May. The Flathead and 

 liitterroot valleys have the same type of precipitation, but lesser 

 amounts, while east of the Continental Divide there is no January and 

 .Vovemlx^r higli-poinl precipitation, but a greatl\- increased May and 

 June downpour, whicli is a part of the continental tyi)e of rainfall. 



The demand for chemicals derived by distillation from wood has been 

 greatly stimulated by the war for war uses directly and as a consequence 

 of the cessation of (jerman imports. Among the u.ses directly for war 

 purposes mav be cited the manufacture of acetic acid and acetone, used 

 as a solvent in the manufacture of explosives, .\mong the uses which 

 will continue after the war to call for wdod derivatives may be nicn- 

 tioiied: Acetone, as a solvent in the pnKluction of moving-picture films 

 and for gums used for induNtrial purposes; acetic acid, it-> commercial 



