THE GIRTH-INCREASE OF TREES. 65 
PYRUS AUCUPARIA. 
5 —— ANNUAL ——— 22 ae 
& sé fee sy | : Total. ‘Av. | 2 
. |Pecade.] 1288, | 1889. | 1899. | 1891. | 1892. | 1893. | 1894. | 1895. | 1896. | 1897. ass 
nee ee tee Fae 
7| .. | 30] -40| -75| 55] -75 co | 65 | 3] 351 70} 510] -€4 | 12-45 
79} .. | 75 {105/110} 90} -2of 45 | 80} 80] 90| 85] 715| -a9 | 14-70 
13 | mofo [ow | 5} 90| 75} 70] -0| 00 | 320| 0 |1650 
The rate of No. 77 was only ‘60, kept down perhaps by the 
very sandy soil where it grew, in the South border of the 
Arboretum, as No. 79, in the East border, had the considerably 
better rate of _ 89. It was somewhat less, only ‘80, in No. 13, 
favourably situated in the West border, but it has been 
under observation for only four available years. The ranges 
of all three, -4o to 70, ‘75 to 1°10, and ‘70 to ‘90, have been 
moderate. 
PRUNUS PADUS. 
Annual ANNUAL INCREMENTS. : 
= ei) Total. ey at 
1893. | 1895. | 1896. | 1897. 
1889. | 1890, | | 1891, eae 1893. 
‘70 }1:00 | 60) 00 | ‘75 | “70 | 6°80| 76 | 11°20 
1:35 | 1:10 | 10°40 | 1°30 | 17-20 
8 & | No. in List. 
o { 
{ 
135 | 136 | 15 | -80 | 1-05 | 1°55 
ea 1:90 | 1-60 | 1-70 
1-10 | 1:00 | 720; 1°80 | 21°65 
— ne 
is 
These two trees, growing apparently under much the same 
conditions in the South border of the Arboretum, before being 
transplanted, have fared very differently, the rate of No. 18 
being only -76, while that of No. 22 was 1°30. @The range in 
both was comparatively small, ‘60 to 100 and 1'05 to 1°55. But 
No. 5, South of the Arboretum Lodge, proved greatly superior 
to these, with an average of 1°80 for four years, and the small 
range of 1°60 to 2°00. It is thus one of the few trees of 
any species that has grown as much as two inches in a single 
year. 
