•SSI. NOTKS ON lUtTTTSH FOKKST TREES. 



about one-half of tliat in tlie coast districts. Fncler any 

 circumstances, as far as experience goes at present, the 

 Douglas iir, if planted in suitable localities, outgrows all 

 European limber trees. The tree also attains a great diameter : 

 the average diameter of mature trees, 200 feet high, in the coast 

 districts is given as about () feet, and in Montana as about 

 2^ feet. It follows that the volume increment is very great. 

 Experience up to date shows that it exceeds the fastest growing 

 of European trees to a considerable extent, as the following 

 data will show : — The Taymount plantation yielded the 

 following data in 1R88:— 



Age = 82 years (including the age of the plants when 



put out). 



Number of trees per acre . . . = 202 



Mean diameter =12 inches 



Mean height ..... =60 feet 

 Volume, excluding all material under 8 



inches diameter . . . = 3,738 cubic feet 



Mean annual production . . . =117 ,, ,, 



Sample areas measured in the same wood l)y Mr. Pitcaithley 

 in 1903 showed the following results : — 



Age -47 years 



Numl)er of trees per acre . . . = 202 



Mean diameter =15 inches 



Mean height =79 feet 



Volume = 10,218 cubic feet 



Mean annual production . . . =217 ,, ., 



The plantation was too heavily thinned in 1887. since when 

 no further thinning had been made. 



The Taymount plantation consists of tlie Pacific variety. 

 The Colorado variety is not likely to yield anything lil<e the 

 al)ove-mentioned results. 



