564 PROFESSOR DANIELL ON THE WATER-BAROMETER ERECTED 
1831. 
Thermometers. 
Water- 
larometer. 
Tempera- 
ture of 
Mercury. 
Mercurial 
3arometer. 
Water- 
Barometer 
reduced to 
Mercury. 
Difference. 
Elasticity 
of Vapour. 
Difference. 
In. 
Out. 
Inches. 
Inches. 
Inches. 
Inch. 
Inch. 
Inch. 
Sept. 1 
63 
62-5 
392-65 
60 
29-887 
2 
59 
59 
392-13 
54 
29-767 
3 
58 
58 
393-51 
53 
29-852 
4 
58 
58 
392-56 
54 
29-786 
5 
62 
62 
392-11 
63 
29-721 
6 
64 
63-5 
391-94 
64 
29*846 
7 
61 
60-5 
392-48 
56 
29-835 
8 
58-5 
58 
390-97 
54 
29-656 
9 
57 
57 
389-34 
53 
29-541 
10 
57*5 
58 
392-14 
66-5 
29-720 
11 
57 
57-5 
394-18 
56 
29-908 
12 
58-5 
59 
396-36 
59 
30-101 
13 
59 
59-5 
396-79 
57-5 
30-159 
14 
59-5 
60 
395-80 
59 
30-071 
15 
59 
59 
396-24 
56 
30-100 
16 
59 
59 
396-76 
59 
30-150 
17 
59 
59-5 
397-09 
58 
30-190 
18 
59 
59 
395-54 
58 
30-069 
19 
59-5 
59 
397-32 
58 
29-884 
20 
57-5 
58 
392-70 
52 
29-798 
21 
58*5 
59 
391-64 
59 
29-745 
22 
59 
59 
393-04 
56-5 
29-857 
23 
58 
57'5 
395-68 
55 
30-029 
24 
59-5 
59’5 
396-70 
59-5 
30-152 
25 
60 
60 
394-59 
59 
30-001 
26 
! 61 
61 
393-83 
61 
29-958 
27 
: 61 
61 
392-83 
60 
29-855 
28 
62 
6l*5 
390-77 
60 
29-680 
29 
62-5 
62-5 
388-51 
62 
29-577 
30 
63 
63 
387-34 
62-5 
29-502 
Means. . . . 
59-6 
I 59-7 
| 393-45 
1 — 
58-1 
| 29-880 
28-879 
1-001 
•560 
■441 
