IN THE HALL OF THE ROYAL SOCIETY. 
557 
1831. 
Thermometers. 
Water- 
Barometer. 
Tempera- 
ture of 
Mercurial 
Barometer. 
Water- 
Barometer 
reduced to 
Mercury. 
Difference. 
Elasticity 
of Vapour. 
Difference. 
In. 
Out. 
Mercury. 
February 1 
o 
42 
o 
41-5 
Inches. 
390-61 
o 
44 
Inches. 
29-177 
Inches. 
Inch. 
Inch. 
Inch. 
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 
