286 KNupDsON: CAMBIUM DEVELOPMENT IN AMERICAN LARCH 
In order to show more clearly the results obtained and to aid 
in the interpretation the following two tables have been compiled 
from the preceding. In the TABLE Ix are presented for each of 
the branches the average number of rows of xylem cells and the 
average diameter increase of the xylem tissue for the entire lateral 
branch. The averages are obtained from the figures for each 
individual cutting. 
DIAGRAM 111. Diameter increase of xylem in various parts of tree E on May 2 
TABLE IX 
AVERAGE DIAMETER INCREASE OF XYLEM IN LATERAL BRANCHES 
Branch Average no. of rows of new Average diameter increase 
xylem cells of xylem 
Busca pacaea he dae eee 0 
LE is Se Bee eee ts) : ; 
jh eee rey Ratalienl Moire OU cy I 1s B 
AY sala) waste die nie oy cae menue te 1.25 ee ae 
ef wipe skh wae Ragin ee ee emg 0.83 I4.D yu 
PPE Se a Fee Ok, CUE me are See eke ¥ Zs ¥ 
VEE ss cities eee oa bees 0.25 : i - 
From the above table it is evident that the least growth 
occurred in the top and basal branches and the greatest growth 
