( IV ) 
Weight of a Cubic 
Foot of Air. 
Dlff. from 
average of 
30 years. 
£ b b b 
1 i 1 
o 
b 
M *s rA 
E b b b 
4-1 1 
M 
b 
1 
a 
« 
Sj <^ r< fs 
*s 
M ^A 
rA fA 
»VN 
Elastic Force 
of Vapour. 
Dlff. from 
average of 
30 years. 
c o o o 
0 o o 
1 + + 
O 
O 
o 
+ 
00 O n 
M "-1 (-A 
o ? ? P 
o o o 
+ 1 1 
H 
o 
o 
1 
a 
QJ 
s 
vr\ O >^ 
^ VD 
i3 ^ 
b b b 
o 
n 
O 
r» O 
1^ CO Tl- 
b b b 
ON 
b 
Temperature of 
Water 
of the 
Thames. 
o • b U 
1^ 
■<*• 
O " o 
° ON V b 
fc^ NO 
Air— Daily Range. 
Diff. from 
average of 
30 years. 
O 
g M O 1^ 
1 1 + 
»J^ 
O 
+ 
0 00 oo 
O IS w D 
1 + 1 
o 
T 
i 
w 
^ 00 O OO 
M 
rA 
tH 
\D fA fA 
® NO 00 
M r* »H 
a 
1 
Dlff. from 
average of 
30 years. 
1 + + 
o 
+ 
ON ^A 
Q M M 
+ 11 
CO 
O 
1 
i 
^ o oo oo 
rA 
4J-V tJ- 
® r* rA 00 
^ ^ 
ON 
d 
o 
s 
o 
Diff. from 
average of 
30 years. 
ON 0 3^ 
° 1 + + 
rA 
O 
+ 
r< kA n 
M M tA 
+ 11 
1 
a 
s 
O >^ O 
O r» O r« 
rA Tj- -^J- 
r* 
so 
rA 
r* CO ^ 
o ' L 
^A t-i 
rj- Tj- kA 
r* 
oo 
Diff. from 
average of 
30 years. 
O r* <r\ 
tj-\ rr\ 
° 1 -1- 4- 
b 
O M rA 
O O M Ci- 
+ 1 1 
vO 
1 
Diff. from 
average of 
100 years. 
IH OS O 
O rA 
1 + + 
+ 
r-. r>. tJ- 
+ 1 1 
CO 
o 
1 
i 
r< o\ 
o ■ • . 
Tj- 
b 
^r 
I--- OO 
^ ^ 
1871. 
Months. 
February 
March 
a 
<u 
IP, 
April ., 
May .. .. 
June .. .. 
a 
a 
<u 
