360 JOUENAL OF THE ROYAL HORTICULTURAL SOCIETY. 
1 degree warmer than the air, but less than half a degree colder than the 
air at 1 ft. deep. Whereas in the warmest month (July) the soil at 4 ft. 
and 2 ft. deep was respectively 8 degrees and 4 degrees colder than the 
air, but at 1 ft. deep it was about half a degree warmer than the air. 
DIAGRAM^ 
Mmjh tejnperatizr&ofthe' azr cU Ouswick co7rizfared.u^tt?v th^ 
TTieoTv temperature o/^^ soil at^6o.7rL. at//^.tt YPa/td. d£€p 
Temp. 
JANUABY 
FEBRUARY 
MARCH 
APRIL 
MAY 
JUNE 
JULY 
AUGUST J 
EPTEHBER 
3aOBER \ 
WVEMBER 
)ECEMBER 
0 EG- 
67 
66 
66 
64- 
7 V 
63 
62 

/ 
61 
— 
/ 
t 
\ \ 
60 
// / 
59 
/ 
r ^ 
56 
—f- 
57 
''U 
Jr 
/ 
56 
U — 4- 
>r 
TV-^ 
\ k 
— 
55 
ij 
1 1 
\ V 
54 
,7/ 
/ 
^ \ \ 
53 
;// 
'//' 
\« \ 
\ \ 
6Z 
' /' 
-f— 
v \ 
y 

61 
// ^ 
50. 
If- 1 
V\ 
\ 
\ 
-H 
4-9 
\ 
\^ 
48 
// 
Jr 
4^ 
V 
47 
r 
46 
Tjiter 
ireot 
theaz 
45 
h 
iperoA 
■t7l&6 
ail 
44 
• 
at 
.ati 
43 
-■Me 
a/htc 
Tipcrc 
I tare 
soiZ 
4Z 
J I 
cut 
9 ci.m 
I. atZ 
41 
/ i 
<-Mt 
'OJt tt 
imper 
citure 
i - soil 
40 
\ /■ 
•j 
U 
9 CL T 
ll.Cit 
39 
V 
^ 
38 
37 
Fig. 170. 
The Thermometek on Post. 
At the beginning of the report it was stated that no change had been 
made in the position of any of the instruments. This statement is 
correct as regards the standard instruments which form the proper 
