IN THE HALL OF THE ROYAL SOCIETY. 
561 
1831. 
Thermometers. 
Water- 
Barometer. 
Tempera- 
ture of 
Mercury. 
Mercurial 
Barometer. 
Water- 
Barometer 
reduced to 
Mercury. 
Difference. 
Elasticity 
of Vapour. 
Difference. 
In. 
Out. 
o 
Inches. 
o 
Inches. 
Inches. 
Inch. 
Inch. 
Inch. 
June 1 
57 
57 
395-59 
57 
29-843 
2 
58 
58 
398-21 
55 
30-063 
3 
58 
58 
398-54 
55 
30-100 
4 
59 
59 
390-52 
56 
30-130 
5 
60 
60 
397-47 
59 
30-0-58 
6 
59 
59 
390-01 
56 
29-900 
7 
58 
58 
390-30 
55 
30-010 
8 
57 
57 
394-58 
55 
29-787 
9 
58 
57"5 
394-47 
56 
29-795 
10 
60 
60 
392-25 
59 
29-642 
11 
60 
60 
390-64 
60 
29-539 
12 
62 
62 
392-31 
62 
29-709 
13 
62 
62 
393-72 
61 
29-791 
14 
62-5 
62 
397-07 
61 
30-076 
15 
62 
62 
394-76 
62 
29-827 
16 
61 
61 
393-50 
60 
29-775 
17 
61 
61 
394-48 
59 
29-864 
18 
61 
61-5 
395-65 
60 
29-946 
19 
63 
63 
394-08 
63 
29-848 
20 
61-5 
61 
397-53 
59 
30-101 
21 
62 
62 
397-63 
60 
30-129 
22 
63 
62-5 
397-32 
61 
30-128 
23 
64 
64 
397-11 
66 
30-129 
24 
63-5 
63 
394-51 
59 
29-915 
25 
61-5 
61-5 
392-59 
60 
29-718 
26 
59-5 
60 
390-85 
58 
29-568 
27 
59 
59 
394-60 
57 
29-837 
28 
60 
60 
393-94 
59 
29-814 
29 
59-5 
59*5 
395-83 
58 
29-954 
30 
59-5 
59-5 
395-49 
58 
29-926 
Means. . . . 
60-4 
60-3 
394-52 
58-9 
29-897 
28-952 
•945 
•560 
•385 
