THE DOUGLAS FIR PLANTATION AT TAYMOUNT, 



273 



The mean diameter may be put at 15-9 inches, equal to a 

 girth of 4 feet If inches. In 1888 Dr Schlich found the 

 average diameter to be 12 inches, his sample tree being a quarter 

 inch less. 



Some trees having last winter been blown down towards the 

 margin of the wood, Mr Pitcaithley measured a typical one in 

 6 feet sections, the details of which are given below. The total 

 length was 80 feet, the diameter of 3 inches being reached at 

 7H feet. The true cubical contents work out at 58 '9 3 feet, or 

 16 "7 6 feet calculated by quarter-girth measure. 



No. 1. — Sample Douglas Fir, Measured 1903. 



Mean 



Diameter of 



.Sections. 



Indies. 

 18-0 

 16-2 

 15-3 

 14-5 

 13-5 

 ]2-6 

 11-6 

 10-5 

 9-2 



7-6 

 5-5 

 3-6 



\'olume of 



Wood in 



each Section. 



Cubic feet. 



10-60 



8-.')9 



7-66 



6-88 



5-96 



5-19 



4-40 



3-61 



2-77 



1-89 



•99 



•39 



Total, 



7U 



58 ^93 



Volume of 



Wood by 



Quarter-girt li 



Measure. 



Cubic feet. 

 8-31 

 6^77 

 6^00 

 5-41 

 4^68 

 4-08 

 3-45 

 2^84 

 2^15 

 1-50 

 0-77 

 0^30 



46^76 



As, however, this tree was rather larger than the average, 

 girthing, as it did at breast-height, 4 feet 7 inches (17-5 inches 

 diameter), Mr Pitcaithley was good enough to select a normal 

 standing tree, girthing 4 feet 1 inch (15-6 inches diameter, 1327 

 square feet section area) at i^ feet from the ground, and this 

 was duly measured in 6 feet lengths. Its total height was 

 83 feet, the point of 3 inches in diameter being reached at 

 75 feet. The true cubical contents, neglecting top and branches, 

 were found to be 5025 feet, or, calculated according to English 

 measure, 39^49 feet. With 202 trees to the acre — and there 

 are probably rather more than less — this gives the enormous 

 total of 10,150 cubic feet, or, by quarter-girth measure, 7977 

 cubic feet. 



