678 Forestry Quarterly 



88 annual rings and was 11.5 inches in diameter. Measurements 

 between the butt and the top of the log are given in Table I. 

 The heart wood was in general clear and sound, but sapstain and 

 other forms of fungous attack were common in the sapwood. 



The sapwood averaged about 40 mm, or P/ie inches, in thick- 

 ness, and contained about 40 annual rings. It showed, in general, 

 the slowest growth of any part of the tree. In fact it appeared 

 that the growth was rapid up to from 30 to 40 years from the pith 

 and then gradually decreased in the direction of the periphery. 

 (Table III and Fig. 3.) As is illustrated in Figure 1,^ showing a 

 graphical reconstruction of the tree, the diameter at the butt is 

 wide in proportion to the rest of the tree ; from the butt to about 30 

 feet from the ground the decrease in diameter is rapid, from 30 to 

 90 feet is relatively slow, and from 90 feet to the top, 154 feet from 

 ground, is increasingly rapid. Table III summarises the measure- 

 ments of the extent of each 20 annual rings along the actual radius 

 from which were taken chips for fiber measurements. Since a mean 

 radius was not always selected, a slight discrepancy appears if a 

 comparison is made, using as figures the average diameter and total 

 nimiber of rings as stated, as a basis for determining the rate of 

 growth in diameter. In Figure 1 some allowance had to be made 

 for the fact that a mean radius was not always chosen in making 

 the measurements. The rate of growth for the complete radius 

 at different heights. Table III, as shown by comparing the aver- 

 ages for different discs, reveals no marked change except an in- 

 crease at the butt end. The average of all appears to be 1.96 mm, 

 per year, for discs A and B, 2.6 mm, and for the remainder 1.9 mm. 

 These figures represent the radial increment. Taking the average 

 figures by rings, however, there appears a marked difference, the 

 rate of growth being more than five times as great near the pith as 

 it is near the periphery with the change between the two as listed 

 in Table III and shown graphically in Figure 3 and also on the left- 

 hand side of Figure I. Ciuiously enough the average fiber length 

 in the last annual ring is about five times as great as in the first 

 annual ring. Figure 3 also shows the average length of fiber by 

 rings and it will readily be seen that the indication is that in- 

 creased growth in diameter produces a shorter fiber. The broken 

 line is drawn through points plotted from average figures omitting 



* To exactly locate the position in tree of any ring measured refer to Figure 1. 



