5()2 PROFESSOR DANIELL ON THE WATER-BAROMETER ERECTED 
1831. 
Thermometers. 
Water- 
Barometer. 
Tempera- 
ture of 
Mercury. 
Mercurial 
Barometer. 
Water- 
Barometer 
reduced to 
Mercury. 
Difference. 
Elasticity 
of Vapour. 
Difference. 
In. 
Out. 
Inches. 
o 
Inches. 
Inches. 
Inch. 
Inch. 
Inch. 
July 1 
60 
60 
396-67 
59 
30-030 
2 
61 
61 
395-55 
59 
29-959 
3 
62 
62 
394-97 
61 
29-935 
4 
62-5 
62-5 
397-17 
61 
30-126 
5 
64 
64 
397-06 
63 
30-165 
6 
65 
64-5 
398-21 
64 
30-259 
7 
64-5 
64-5 
398-23 
63 
30-269 
8 
64 
64 
397-16 
62 
30-167 
9 
65 
64-5 
396-03 
63 
30-093 
10 
68 
68 
393-38 
67 
29-977 
11 
63-5 
63-5 
392-76 
62 
29-832 
12 
65 
65 
389-30 
64 
29-586 
13 
64 
64-5 
389-02 
63-5 
29-627 
14 
63 
62-5 
390-74 
63 
29-668 
15 
62 
62-5 
391-02 
62 
29-679 
16 
62*5 
62-5 
391-23 
63 
29-697 
17 
62 
62*5 
393-50 
63 
29-878 
18 
62-5 
62 
394-58 
62-5 
29-956 
19 
62-5 
62 
393-18 
62-5 
29-860 
20 
63 
62-5 
391-65 
62-5 
29-750 
21 
64-5 
64 
389-78 
65 
29-626 
22 
62 
61-5 
392-13 
63 
29-756 
23 
62-5 
62 
392-10 
63 
29-768 
24 
61-5 
61-5 
391-80 
60 
29-730 
: 
25 
63 
62*5 
394-73 
61 
29-985 
26 
63 
62-5 
396-11 
61-5 
30-097 
27 
65 
64*5 
396-30 
63 
30-166 
28 
67"5 
67 
394-68 
66 
30-097 
29 
67‘o 
67 
394-02 
66 
30-034 
30 
31 
Means. . . . 
63*5 
63-3 
393-90 
62*7 
29-923 
0* 
CO 
00 
1-011 
•636 
•475 
