IN THE HALL OF THE ROYAL SOCIETY. 
557 
1831 . 
Thermometers. 
Water- 
Barometer. 
Tempera¬ 
ture of 
Mercury. 
Mercurial 
Barometer. 
Water- 
Barometer 
reduced to 
Mercury. 
Difference. 
Elasticity 
of Vapour. 
Difference. 
In. 
Out. 
o 
O 
Inches. 
Inches. 
Inches. 
Inch. 
Inch. 
Inch. 
February 1 
42 
41-5 
390*61 
44 
29*177 
2 
42 
42 
390*08 
44 
29*188 
3 
41 
41 
394*31 
44 
29*431 
4 
45-5 
45 
388*04 
48 
29*031 
5 
43 
43 
396*29 
47 
29*580 
6 
43*5 
43 
400*59 
46 
29*931 
7 
45-5 
45 
394*46 
48 
29*490 
8 
49 
49 
398*68 
52 
29*849 
9 
51-5 
51 
399*35 
53 
29*723 
10 
53 
53 
402*21 
54 
30*169 
11 
55 
55 
402*07 
55 
30*196 
12 
53 
53 
402*82 
56 
30*230 
13 
53-5 
53 
402*47 
56 
30*212 
14 
54 
54 
402*17 
53 
30*169 
15 
53 
53-5 
401*18 
50 
30*056 
16 
52 
52 
397*86 
51 
29*825 
17 
50-5 
50 
398*95 
52 
29*876 
18 
48 
47 
403*08 
51 
30*172 
19 
48 
48 
401*28 
51 
30*050 
20 
48 
47-5 
399*87 
47 
29*935 
21 
45 
44-5 
401*63 
43 
30*045 
22 
43 
43 
401*17 
47 
29*995 
23 
44-5 
44 
406*16 
42*5 
30*389 
24 
45-5 
45 
403*14 
47 
30*158 
25 
49 
48 
397*98 
50 
29*820 
26 
47 
47-5 
391*20 
50 
29*209 
27 
46-5 
46 
391*74 
49 
29*325 
28 
46 
46 
394*59 
46 
29*526 
Means .. .. 
47*8 
47-5 
398*35 
49*2 
29*813 
29-239 
*574 
•376 
*198 
4 c 
MDCCCXXXII 
