IN THE HALL OF THE ROYAL SOCIETY 
567 
1831. 
Thermometers. 
Water- 
Barometer. 
Tempera¬ 
ture of 
Mercury. 
Mercurial 
Barometer. 
Water- 
Barometer 
reduced to 
Mercury. 
Difference. 
Elasticity 
of Vapour. 
Difference. 
In. 
Out. 
o 
Inches. 
Inches. 
Inches. 
Inch. 
Inch. 
Inch. 
Dec. 1 
48 
48 
398-17 
50-5 
30-135 
2 
50-5 
50 
396-35 
52 
30-021 
3 
52 
51-5 
397-29 
52-5 
30-120 
4 
51 
50-5 
39625 
51-5 
30-013 
5 
51-5 
51-5 
393-73 
52-5 
29-814 
6 
52 
52 
388-33 
53 
29-385 
7 
53 
53 
382-21 
54-5 
28-962 
8 
54 
54 
384-41 
55-5 
29-124 
9 
56 
56 
384-33 
57-5 
29-139 
10 
55-5 
55 
387-54 
57 
29-366 
11 
56 
56 
386-65 
57-5 
29-315 
12 
56*5 
56 
386-64 
56 
29-308 
13 
56-5 
56 
386-66 
57 
29-306 ' 
14 
56 
56 
389-44 
55-5 
29-539 
15 
55 
55 
382-29 
51 
29-740 
16 
54 
54 
383-35 
50 
29-820 
17 
52-5 
52 
391-95 
52 
29-674 
18 
53 
53 
387-43 
54 
29-330 
19 
51 
50-5 
390-15 
50 
29-507 
20 
51 
51 
393-05 
53-5 
29-760 
21 
52 
52 
391-01 
53 
29-623 
22 
49-5 
49 
394-33 
48 
29-853 
23 
49 
49 
393-42 
48 
29-765 
24 
47 
46-5 
399-04 
50 
30-196 
25 
44 
43-5 
400-99 
41 
30-346 
26 
43 
43 
400-30 
46 
30-261 
27 
44 
44 
401-82 
30-435 
28 
44-5 
44 
401-85 
46 
30-416 
29 
46 
45-5 
400-46 
47 
30-320 
30 
46-5 
46 
399-15 
46 
30-210 
31 
45-5 
45 
399-43 
44-5 
30-221 
Me as.. ,. 
50-5 
50-6 
392-51 
51-2 
29-775 
28-786 
0*5 
GO 
<75 
•414 
•575 
4 D 2 
