132 
MR. GLAISHER ON THE CORRECTIONS TO BE 
Table V. — Showing the mean depression of the temperature of evaporation below 
that of the air, at the height of 4 feet above the soil, at every hour in each month. 
Local mean 
time. 
Januar)'. 
Feb. 
Mareh. 
April. 
May. 
June. 
July. 
August. 
Sept. 
October. 
Nov. 
Dec. 
O 
O 
O 
O 
O 
O 
O 
O . 
O 
O 
O 
Midnight. 
0-9 
0-9 
1-1 
1-2 
1-3 
17 
17 
I'O 
0-6 
0*9 
0*9 
0*9 
1 A.M. 
1-0 
0-9 
0-9 
1-0 
1-0 
1-5 
1-3 
0-9 
07 
0*7 
0*9 
1*0 
2 
1-0 
0-9 
0-8 
0*8 
07 
1-2 
M 
0-8 
0-6 
0*6 
0*9 
0*9 
3 
10 
0-8 
07 
07 
0-6 
1-0 
0-8 
0-6 
0-4 
0*6 
0*9 
0*9 
4 
1-0 
0-8 
07 
0-6 
0-6 
0-9 
0-6 
0-5 
0-3 
0*5 
0*8 
0*9 
5 
1-0 
0*9 
07 
07 
0-8 
0-9 
0*8 
07 
0*3 
0*4 
0*8 
0*8 
6 
1-0 
0-9 
07 
1-0 
1*0 
1*5 
1-4 
1-0 
0*3 
0*4 
0*8 
0*7 
7 
1-0 
0-9 
0-9 
1*5 
1-5 
2-6 
2'1 
1-4 
0*5 
0*6 
0*7 
0*8 
8 
1-0 
1-0 
1-4 
2-1 
2-3 
37 
3-0 
2-3 
1-2 
07 
0*8 
0*9 
9 
1-0 
1*3 
2-0 
3-0 
3*2 
4-8 
4-0 
3-4 
2*0 
1*2 
1*1 
1*0 
10 
1-0 
1-5 
2*5 
4-0 
3-9 
5-8 
5-0 
4-4 
2*9 
1*9 
1*5 
1*3 
11 
1-1 
1-8 
2-9 
4-8 
4-6 * 
6-8 
5-8 
5-3 
3*8 
2*7 
1*8 
1*8 
Noon. 
1*4 
2-0 
3-3 
5*6 
5-4 
77 
6*5 
6-1 
4*5 
3*3 
2*1 
2*0 
1 P.M. 
1*6 
2'2 
37 
6-2 
6-0 
8-3 
67 
6*6 
5*1 
37 
2*3 
2*1 
2 
1-8 
2-3 
3-8 
6*5 
6-3 
8-6 
67 
67 
5*6 
3*8 
2*3 
2*1 
3 
1-9 
2-5 
3-8 
6-3 
6-2 
8*2 
67 
6-6 
5*9 
3*7 
2*0 
1*9 
4 
1-9 
2-0 
3-6 
5-9 
5-6 
7-1 
6-1 
6-0 
5*3 
3*5 
1*8 
1*6 
5 
1-7 
1-5 
3*3 
5-5 
5-1 
6-9 
5-9 
5-8 
4*2 
2*7 
1*6 
1*5 
6 
1-6 
1-2 
27 
4-8 
4-5 
6'2 
5-2 
5-0 
3*0 
2*0 
1*4 
1*1 
7 
1-3 
1-0 
2-0 
3-8 
3-5 
5-3 
4-3 
4-3 
2*1 
1*8 
1*1 
1*0 
8 
1-0 
0-9 
1-6 
2-9 
2-8 
4-4 
3-5 
3-5 
1*5 
1*4 
1*0 
0*9 
9 
1-0 
0-8 
1-4 
2-3 
2-3 
3-3 
2-8 
2-5 
1*0 
1*2 
1*0 
1*0 
10 
0-9 
0-8 
1-2 
17 
17 
2-5 
2-3 
17 
0*7 
1*0 
0*9 
1*0 
11 
0-9 
0-8 
1-1 
1-4 
1-4 
2-0 
1-9 
1-3 
0*5 
0*8 
0-9 
ro 
The times at which the least and greatest differences, between the readings of the 
dry- and wet-bulb thermometers, with the amounts of the differences in every month, 
were as follows : — 
Tj,„ (The least 
vaU*-) difference 
,}was 
o 
p 
do 
And it 
took place 
}at 111^20°' P.M. ; 
jwas 1°*8{ 
And it 
took place 
.}from 2^ P.M. to 4*' p.m. 
Feb. 
” \ 
r was 
[ or 
0°*8l 
0°*9/ 
55 
during the night hours ; 
55 
was 2°*5 
55 
at 3*' P.M. 
Mar. 
was 
o 
O 
55 
from A.M. to 6** a.m. ; 
55 
was 3°*8 
55 
from 1*' 40'" p.m. to 3’' O'" p.m. 
April 
55 
was 
0°*6 
55 
at 4’' A.M. ; 
55 
was 6°*5 
55 
from 2^ O '" p.m. to 2^ 30'" pjw. 
May 
55 
was 
0°*6 
55 
from 3'' A.M. to 4^* a.m. ; 
55 
was 6°*3 
55 
from 2^ O'" p.m. to 2^ 40'" p.m. 
June 
55 
was 
O 
p 
55 
from 4^ a.m. to 5*^ a.m. ; 
55 
was 8°*6 
55 
from 1'' 40'” p.m. to 2^ lO"" p.m. 
July 
55 
was 
0°*6 
55 
from 4** O '" a.m. to 4^* 40'" 
A.M. 
; was 6°*7 
55 
from O'' 40"’ p.m. to 3’’ O'" p.m. 
Aug. 
55 
was 
0°*5 
55 
from 3** 40"" a.m. to 5'' 45'" 
A.M. ; 
; was 6°*7 
55 
from 1'’ 10'" P.M. to 2'’ 50'" p.m. 
Sept. 
55 
was 
o 
p 
55 
at 5’' 20"* a.m. ; 
55 
was 5°*9 
55 
at 3'’ P.M. 
Oct. 
55 
was 
o 
p 
55 
from 5'' A.M. to 6*' 20'" a.m. ; 
was 3°*8 
55 
from 1'’ 40'" p.m. to 2'’ 50'" p.m. 
Nov. 
r was 
L or 
o o 
p p 
do 
55 
at all night hours ; 
55 
was 2°*3 
55 
from 1'’ O'" p.m. to 2'’ 10'" p.m. 
Dec. 
55 
was 
o 
p 
55 
at all night hours ; 
55 
was 2°*1 
55 
from l'’ O '" P.M. to 2'’ O '” p.m. 
The times of least difference in the year are the morning hours in September, and 
the times of greatest difference are from p . m . to p . m . in June. 
