566 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. 
Inches. 
Inches. 
Inch. 
Inch. 
Inch. 
Nov. 1 
57 
5°7 
395-11 
57 
30-002 
2 
57 
57 
391-77 
58 
29-722 
3 
51-5 
51 
389-52 
54 
29-473 
4 
49-5 
49 
392-97 
50 
29-696 
5 
51 
50 - 5 
390-70 
51-5 
29-557 
6 
5T5 
51-5 
391-43 
51 
29-616 
7 
53 
52-5 
388-99 
52 
29-431 
8 
51-5 
51 
391-36 
52-5 
29-601 
9 
52 
51-5 
397*31 
50-5 
30-086 
10 
51 
51 
401-12 
45 
30-416 
11 
50 
50 
398-83 
52 
30-212 
12 
53-5 
53 
399-17 
54 
30-278 
13 
52-5 
52-5 
395-39 
50-5 
29-963 
14 
50 
50 
392-11 
48 
30-064 
15 
50 
49-5 
390-05 
49-5 
29-476 
16 
44 
44 
388-37 
46-5 
29-283 
17 
43 
43 
392-17 
45- 
29-539 
18 
42 
42-5 
393-49 
43 
29-669 
19 
43 
43 
390-26 
45 
29-420 
20 
42-5 
42-5 
394-93 
45 
29-761 
21 
48 
48 
392-17 
48-5 
29-621 
22 
51*5 
51 
393-77 
52-5 
29-807 
23 
54 
53-5 
394-86 
55 
29-932 
24 
54*5 
55 
395-30 
55 
29-973 
25 
55 
55 
394-51 
56 
29-931 
26 
56 
56 
393-74 
56-5 
29*888 
27 
54 
54 
398-74 
53 
30-245 
28 
48-5 
48 
402-41 
48 
30-468 
29 
46-5 
46 
403-07 
50 
30-522 
30 
46 
45*5 
400-95 
45-5 
30-343 
Means... . 
50-3 
50-1 
394-49 
50-7 
29-866 
28-955 
•911 
•400 
| -511 
