THE GIRTH-INCREASE OF TREES. 99 
No. 4.—CEscuLUS HIPPOCASTANUM. 
| Girth in 
Year Apr. | May. | June.| July.} Aug. Sept, ise ying, —_— - 
| Observation, 
1892, | 10 45 45 35 ace 55 | 80 
1893, | 20 45 40 30 5 65 79 
1894, 20 20 40 15 10 40 65 
1895, | 10 30 30 30 5 40 65 
ag 1 
Total, | 60 | 1:40 Er 5 | 1710 | 20 | 200 | 285 
i BAe | | 12°3 | 200. 29°0- | 32-0 | 22°77 | 4°0 | 41°3 | 58°7 18 
Two Younc TREES, 1887-91. 
P.O, - | = | 9-0 |s10 345 | 22 | 35 | 40 | 60 | 11, 13, 
No. 4 is in agreement with the two-trees of the earlier period, 
not only in the general particulars, but in details and degree. 
The second half-season predominates, there is no increase in April 
and little in September, July is the best month, and the percentage 
for August is high. The best individual records in the three 
trees are 20 in May, 50 in June, 45 in July, 35 in August, and 10 
in September. 
No. 16.—ACER PSEUDOPLATANUS. 
pe | a Girth in 
t 
Year. | Apr. | May. |June.| July.| Aug. | Sept. | 18¢Half/2nd Half! Inches a 
| Observation. 
1892 10 | 55 | 35 5 5 65 45 
1893, 35 | 60 | 30 | 20 5 85 55 
1894 5 5 | 60 | 45 | 10 5 60 60 
Total,*| 5 | 50 “155 110 | 35 | 15 | 210 160 
| 
P.C. | 13 | 185 | 419} 30 | 94 | 9 | 567 | 433 16 
| 
Turee Younc TREES, 1887-91. 
aC. 05 | 138 jw 30 | 18 | 66 44 | 15, 14, 8 
‘ * I have omitted 1895, as = that year <t increase suddenly fell off to less than half an 
inch, indicative of some abnormal condition 
