IN THE HALL OF THE ROYAL SOCIETY. 
565 
1831. 
Thermometers. 
Water- 
Barometer. 
Tempera- 
ture of 
Mercurial 
Barometer. 
Water- 
Barometer 
reduced to 
Mercury. 
Difference. 
Elasticity 
of Vapour. 
Difference. 
In. 
Out. 
Mercury. 
October 1 
63-5 
63-5 
Inches. 
384-11 
63-5 
Inches. 
29-236 
Inches. 
Inch. 
Inch. 
Inch. 
2 
63 
62-5 
384-94 
62 
29-269 
3 
62 
62 
389-45 
60 
29-610 
4 
62 
62 
390-52 
61 
29-689 
5 
61-5 
61 
392-07 
59 
29-805 
6 
59-5 
59-5 
393-23 
59 
29-874 
7 
62 
61-5 
390-60 
63 
29-711 
8 
63 
62-5 
389-55 
61-5 
29-658 
9 
61 
60-5 
389-73 
57 
29-613 
10 
59-5 
60 
399-31 
59 
29-558 
11 
61 
61-5 
389-92 
61 
29-629 
12 
60 
60-5 
390-61 
61 
29-694 
13 
60-5 
60-5 
390-00 
60 
29-641 
14 
63 
62-5 
388-20 
64 
29-538 
15 
62 
62 
390-61 
63 
29-605 
16 
60 
60-5 
395-63 
60 
30-091 
17 
58-5 
58 
398-59 
54-5 
30-288 
18 
60 
60 
398-98 
59 
30-354 
19 
60-5 
60 
397-06 
59 
30-213 
20 
61 
60-5 
393-84 
59 
29-937 
21 
60 
60 
392-94 
58 
29-866 
22 
57 
57 
395-53 
52 
30-007 
23 
59 
59 
393-77 
60 
29-918 
24 
59 
59 
395-23 
57-5 
30-031 
25 
57-5 
58 
393-34 
56-5 
29-878 
26 
59 
59 
388-33 
59-5 
29-477 
27 
58-5 
59 
390-75 
58-5 
29-672 
28 
58 
58 
394-47 
57 
29-946 
29 
57-5 
58 
398-09 
57-5 
30-260 
30 
56-5 
56-5 
398-53 
52-5 
30-265 
31 
56-5 
56-5 
397-22 
56 
30-165 
Means. . . . 
60 
60 
392-75 
59 
29*824 
28-827 
•997 
•560 
•437 
4 D 
MDCCCXXXII 
