44 CHRISTISON—ADDITIONAL OBSERVATIONS ON 
up to 12? mil., indicating that the effects of transplantation were 
over, particularly as the quinquennium, then beginning, yielded 
an average of 164, and the next one 21. This was, apparently, 
in accord with the upward march of adult life, but hardly any 
further development has occurred in the final seven years, such 
as might be expected in a sycamore 20 inches in girth. 
The annual records show that in the last ten years the most 
flourishing period was in 1899, 1900, and 1901, when the increases 
were 254, 28, and 264 mil., and that there was a sudden drop to 
14 in 1903. 
1897 1901 1906 
4. 4. i). 6. Dh... Bp. 23 , B 
The foliage, although always healthy, has not the density usual 
in sycamores. Its rate of increase also compares unfavourably 
with that of the following two trees of the same species. 
ACER PSEUDOPLATANUS. No. 71. 
Girth, March, 1887=0'214 mil. 
1887-1890 1891-96 1897-1898 1898 
— 
Amonnt, * 108 1823 0 Died 
Rate, .. et 27 303 0 
This young tree, barely 84 inches in girth in 1887, throve well 
for the eight years when it stood in the south shelter belt of the 
Arboretum, its annual rate being nearly 30 mil., but it did not 
survive removal. 
ACER PSEUDOPLATANUS. No. 74. 
Girth, March, 1887=0°233 mil. 
1887-1890 | 1891-1895 | 1895 189€-1899 1900 | 1900-1905) 1906 | 
Amount, ..| 1063 1863 zai || 33 7 of 10 | 22g | 1803 | 28 
Rete, 3. 263 31h es 7 * 30°7 
