440 Forestry Quarterly. 



tionably to not consulting carefully all available sources of data. 

 Some contradictions appear in the publication and it is certain 

 that a few of the statements will not stand the test of very care- 

 ful weighing. Thus Elms in general are given as "tolerant" but 

 each of the species as "intolerant." 



Nevertheless, the faults do not destroy the value of the work 

 as a whole and it is quite commendable for a students' publication. 



C. R. T. 



A Study of the Growth and Yield of Douglas Fir on Various 

 Soil Qualities in Western Washington and Oregon. By E. J. 

 Hanslick. 



Mr. E. J. Hanzlik's manuscript report of 40 pages dated March 

 14, 1912, is of keen interest to all foresters, and hence receives here 

 a very full review. 



The report covers a series of seven studies : 



(i) Yield tables for Douglas fir stands. 



(2) Mean annual growth and the rotation. 



(3) Site quaHties of Washington and Oregon. 



(4) Influence of aspect upon the density and growth of Doug- 

 las fir. 



(5) Influence of density of stocking on growth and volume. 



(6) Comparison of yield on bench and bottom lands. 



(7) Methods of determining site qualities of Douglas fir 

 stands. 



I. Yield Tables. The study was carried on in about thirty-five 

 different localities, west of the Cascade Mountains into the Coast 

 Range in Oregon, from the Canadian Line on the north to Cot- 

 tage Grove, Oregon, on the south. The altitude of the territory 

 covered varies from about 200 feet along the coast to about 

 2500 feet in the Cascade Mountains. 



This study aimed to include all types and qualities of stands of 

 Douglas fir, providing they were even-aged, pure and fully stocked 

 and under 140 years of age. Care was exercised especially in 

 getting fully stocked stands, so as to obtain data which would 

 approach closely to that which there is reason to believe will be 



