384 R. H. CAMBAGE. 
Hucalyptus parvifolia, No. 1. In 1912 there were four 
branches on that portion of the stem between 1 and 2 feet, 
but these had all gone in 1914. In the same period, 
between the heights of 2 and 3 feet, nine branches dis- 
appeared, and between the 3 and 4 feet marks fifteen 
branches were reduced to one. In a comparatively short 
time after these little branches die off, there is nothing 
left to show that they ever existed. 
So far as the tests recorded in this paper have been 
carried, they have tended to show that although the boles 
and branches increase in diameter as the young trees grow, 
there is practically no extension in length of stem among 
or below the branches, at least during the first few years. 
In other words, though conclusive proof is still wanting, 
especially in regard to tall-growing trees, the results 
obtained make it appear, that once a young tree throws 
out definite branches, the portion of the stem below such 
branches will increase in diameter but not appreciably in 
length, and acts as a sort of strong base upon which the 
superstructure of a tall tree may be erected, and nails 
placed in the stem at any distance apart will retain their 
positions, relatively to each other, forat least several years, 
irrespective of how high the tree may grow. 
