228 Forestry Quarterly. 



Mountains and Blue Range in east central Arizona and is un- 

 usual in that it contains western yellow pine, Douglas fir and 

 Colorado blue spruce in mixture. The mixture of Douglas fir 

 and yellow pine is quite common in the southwest but the occur- 

 rence of blue spruce with the former is out of the ordinary be- 

 cause the requirements of spruce vary so markedly from those 

 of western yellow pine. 



One of the most notable facts brought out by the report is 

 that western yellow pine makes a faster and greater growth in 

 the composite type than in pure stands — there being an increase 

 of i6 to 25 feet in clear length and 5 to 7 inches in diameter 

 growth in 250 years- This is due chiefly to favorable light and 

 climatic conditions, the source of light being overhead rather 

 than from the side, due to the density of the stand. Moreover, 

 the spruce on account of limbiness and extreme tolerance forces 

 an early cleaning of the other species. 



The type is important economically in that it makes possible a 

 'more complete utilization of the forest area and yields an aver- 

 age of 14,100 board feet per acre as against the typical western 

 yellow pine yield of 4,000 to 7,000 feet in this locality. 



The composite type is chiefly valuable as a source of saw tim- 

 ber, although stulls and mining timbers may be exploited when 

 the area becomes more accessible. For a system of manage- 

 ment the author recommends a selection cutting in order to in- 

 sure the continuance of the mixture, with a second cut in 40 to 

 50 years. Rotations of 120 years for yellow pine and Douglas 

 fir and 140 years for spruce are prescribed and in general a piling 

 and burning of brush. C. W. McK. 



Report of the Minister of Lands for the Province of British 

 Columbia for the Year ipi2. Victoria, B. C. 1913. Pp. 360. 



Unlike most Government reports, this one is distributed to the 

 public within a few weeks after the close of the year. It con- 

 sists of four parts — the reports of the Department of Lands 

 proper, the Forest Branch, the Water Rights Branch, and the 

 Survey Branch. 



The report of the Forest Branch (pp. 61-101) is necessarily 

 largely a statement of its general policy and the work planned. 



