382 
Acacia decurrens Willd, var. 
R. H. CAMBAGE. 
normalis Benth. 
Number of branches between each Number of branches between each 
Acacia nerifolia A. Cunn. 
foot. foot. 
18/3/1917 24/7/1918 10/6/1917 20/2/1918 
Diam. 4 inch. |Diam. 23 inches. Diam. 4 inch. Diam. 3 inch. 
16 feet high 6 feet high 7% feet high 
| 9 feet 4 ft. 114 in. 5 feet 5 feet 
3 branches 3 branches 7 branches 7 branches 
| A feet 3 ft. 113 in. A feet 4 feet 
| 4. branches 3 branches 9 branches 8 branches 
| 3 feet 3 feet 3 feet 3 feet 
6 branches 4. branches 12 branches 6 branches 
2 feet 2 feet 2 feet 2 feet 
3 branches 1 branch 10 branches 3 branches 
1 foot 1 foot 1 foot 1 foot 
1 hranch no branch 1 branch no branch 
Ground measured from Ground . 
peg 
From the foregoing tests it will be seen that the vertical 
growthin very young trees appears to be practically limited 
to the terminal shoot or growing point, and does not extend 
to the lower portion of the stem among the branches. 
If this conclusion be accepted as the correct one, there 
are still two other questions to be considered viz:—(1) 
Might there not be a prolongation of the bole over a period 
of 20 or 30 years, and (2) how isit that so many Eucalypts 
may reach a height of 60 feet to the first limb ? 
Although careful experiments and testing can alone 
answer the first question, it would seem remarkable, when 
apparently no extension of the stem takes place among the 
branches while the tree is very young and making rapid 
growth, that it should occur at a later stage. 
Take the case of the Camphor Laurel (Cinnamomum 
camphora, No. 2), where the stem increased 5% feet in 
length, or double its original, in one year and five months, 
without anything being added to the lower four feet. 
