62 CHRISTISON—ADDITIONAL OBSERVATIONS ON 
the last four years, although the tree retains its very healthy, 
vigorous, spreading appearance. 
PYRUS COMMUNIS. No. 8. 
Still stands in its original position in the west shelter belt. 
Girthing 11 inches in 1892, its average rate of increase was 20} 
for four years. It was then, by some mistake, pruned to such 
excess that a perpendicular section of the foliage would have 
resembled a sharp-pointed spear. 
The result on the girth-increase was, of course, disastrous, 
as shown in the Table, although it is remarkable that there 
should have been any increase at all at first, with the 
foliage reduced almost to nil. The decline, however, was steady 
till zero was recorded in 1899 and 1} in 1900, Thinking 
that the tree was dead or dying, I gave up measuring it; but in 
1903 it was beginning to form a head of foliage, and a remeasure- 
ment in autumn showed an average increase of 33 for the three 
years 1901-3, and this has been slightly improved upon since. 
Average Average 
of 1896-1900 of 1904-1906 
Four Years. Three Years, 
1901-1903. 
21 Ce Ge ae eee . 33 «Seen gee: 
The tree has now assumed a columnar form, the foliage being 
nearly equally wide below and above. The stem is 9 feet 
long and the height of the tree 22 feet, the foliage-spread, or 
diameter, being only 6 feet. The young branches all tend to 
grow upwards, resembling a Lombardy poplar. As the foliage is 
dense and healthy, it will be interesting to see if it will now 
spread out, and if a tree, which had been so near dying, can 
eventually thrive. It is well placed, with room to spread, and in 
autumn 1906 was surface-manured with withered leaves and 
grass. 
QUERCUS CERRIS. No. 15. 
Situated always in the north border. Girthed almost 6 inches 
in 1892, and for four years had the rate of 17 mil. After pruning, 
it dropped for three years to 144, but rose for the next five to 
193, and for the final three years to 1906 it has been 18. 
