62 CHRISTISON—-OBSERVATIONS ON 
girth, still retains something of its original beauty. The cause 
of its falling off has been ascertained by recent borings to be a 
fungoid disease in the stem. A Birch of the same size at 
Craigiehall in the first decade grew for eight years at the annual 
rate of nearly half an inch. 
The two younger Birches, Nos. 78, 82, yielded rates of 1°17 
and ‘98 for seven and five years respectively, the ranges being 
‘80 to 1°45 and -7o to 140. But No. 17, about the same age, 
showed the much better average of 1°61 for the four available 
years of its career. 
CARPINUS BETULUS. 
UAL INCREMENTS. 
Annua ANN 
Rate, 
i ara Ann. 
| Total. AS. at 
1894. | 1895. | 1896. | 1897. 
Ist Bes he te es ee 
Decade. as. |e. 1890. | 1891. | 1892. | 1893. | 
No. in List. 
33 “41 25 | +40 | 45 | °30 | “45 “B51. *36.) *30 |. “B04. 26 | 3'80| “38 | 52°40 
BE | 65 | °85 ‘10 | 5°65} “71 | 11°90 
86 a 401 10" | 80 1. 10) 710 80 | “65 | 1-60 ‘15 | -00 | 5°60} “70 | 11°30 
No. 33, a tall, erect, and handsome tree in 1878, above three 
and a half feet in girth, grew at the rate of ‘41 in the first 
decade and in the second at the somewhat less rate of -38, always 
rather falling off in condition. It is now four feet four inches in 
girth. The annual rate of the two much younger Hornbeams, 
Nos. 81, 86, selected for the second decade in the South border 
of the Arboretum, was ‘7o and ‘71. Their growth was erratic, as 
shown by the range, which in the former was 45 to 1°00 and in 
the latter ‘40 to 100. 
LIRIODENDRON TULIPIFERA. 
¢ ANNUAL INCREMENTS. 
a Rae : Ann, {Girth 
A=} ist. Total.) “ay. iat 
A Decade. 1888. | 1889. | 1890. | 1891. | 1892. | 1893. | 1894. | 1895. | 1896, | 1897. ye 
6 “60 35 | 40 |} ‘80; 50] 657 40 | 75 {| 35 | 40] -25 § 485] -48 | 86°05 
This short-stemmed but handsome spreading tree seems to 
have been a quick grower up to a girth of about six feet, at the 
