82 CHRISTISON—-OBSERVATIONS ON 
in 1893, had much the same rate, Ch. in the second quin- 
quennium of the second decade. 
In the aggregate returns the only traceable depression was in 
1889, when the two trees then available grew only "75. Deducting 
this year, the growth was pretty steady, the extremes in the last 
five years, when all three were available, being 1°80 and 2°20. 
The range of No. 43 for the two decades was ‘30 to *70, but 
removing two depressed years,—1881, when the tree suffered 
from the low temperatures of the winter, and 1889,—the range 
was only ‘50 to -70. With deduction of 1889, that of No. 63 in the 
second decade was also ‘50 to ‘70, and that of No. 15 in the fourth 
quinquennium was only ‘65 to ‘7o. 
The species appears to thrive even better in the vicinity of 
Edinburgh. Thus, a fine specimen at Craigiehall, when nearly 
seven feet in girth in 1890, had been growing at the rate of °89 
for eleven years; and a very fine healthy tree at Cramond 
House, measured by Sir Robert Christison in 1878, girthed no 
less than 12 feet 8 inches at the narrowest part of the stem, five 
feet above ground. 
QUERCUS PALUSTRIS.* 
* Erroneously called Q. rubra in former papers, from a mistake in the label on — 
the tree, 
a ANNUAL INCREMENTS. 
a wer 85 Ann Girth 
a] Ist : Total. AO at 
s Decade.} 1988, | 1889. |1890. | 1891. | 1992. 1893. | 1894, | 1895. | 1896. | 1897. _ 
45 | -40 | 30} 50} 35 | 45] -40 | 55 | 40] 35 | 25 | 395 | -39 | 3020 
This species does not seem to do so well; at least the largest 
in the Garden, No. 44, now only three and a quarter feet in girth, 
grew at the low rates in the first decade of ‘45 and in the second 
of 39. It was noted since 1880 as having a shabby look, with 
many dead twigs. 
QUERCUS RUBRA. 
= ANNUAL INCREMENTS. 
aie Ann, |Gitth 
s sae Total. Ke: t 
- |Decade.] 1988, | 1889. | 1890. | 1891. | 1892. | 1893. | 1894. | 1895. | 1896. | 1997. 
61 9) | 1-00 | 1°15 $150 | 1:75 | +55 | °50 | -35 | 5°90 | 118 | 12°35 
