556 PROFESSOR DANIELL ON THE WATER-BAROMETER ERECTED 
1831. 
Thermometers. 
Water- 
Barometer. 
Tempera- 
ture of 
Mercury. 
Mercurial 
Barometer. 
Water- 
Barometer 
reduced to 
Mercury. 
Difference. 
Elasticity 
af Vapour. 
Difference. 
In. 
Out. 
o 
Inches. 
Inches. 
Inches. 
Inch. 
Inch. 
Inch. 
January 1 
46 
45 
398-23 
4°6 
29-743 
o 
46 
46 
399-31 
50 
29-823 
3 
46 
46 
399-73 
49 
29-872 
4 
47 
47 
399-29 
46 
29-862 
5 
45 
45 
399-21 
49 
29-820 
6 
47 
47 
403-73 
47 
30-170 
7 
44-5 
44 
409-19 
45 
30-578 
8 
41-5 
41 
409-79 
44 
30-604 
9 
42 
42 
405-45 
46 
30-269 
10 
45 
45 
400-12 
48 
29-882 
11 
44 
44 
402-56 
48 
30-156 
12 
45 
44*5 
402-64 
47 
30-078 
13 
44 
44 
403-15 
44 
30-088 
14 
44-5 
44 
403-63 
48 
30-157 
15 
42-5 
42 
401-93 
46 
29-968 
16 
41 
41 
399-75 
45 
29-832 
17 
43-5 
43 
396-63 
46 
29-518 
18 
45 
45 
395-43 
46 
29-548 
19 
48 
48 
396-30 
50 
29-617 
20 
46-5 
46 
393 65 
50 
29-425 
21 
48 
48 
389-21 
47 
29*117 
22 
50 
50 
389-94 
52 
29-187 
23 
50 
50 
390-93 
53 
29-274 
24 
46*5 
46 
394-44 
49 
29-455 
25 
45-5 
45 
398-27 
47 
29-756 
26 
39-5 
39 
403-22 
44 
30-069 
27 
43 
43 
401-89 
41 
30-049 
28 
43-5 
43 
396-85 
46 
29*530 
29 
42 
42 
400-17 
45 
29-863 
30 
41 *5 
41 
399-75 
45 
29-830 
31 
42 
42 
398-53 
45 
29-753 
Means, , . . 
| 44-7 
44-5 
399 45 
: 46-9 
29-835 
29-319 
•516 
•340 
•176 
