558 
PROFESSOR DANIELL ON THE WATER-BAROMETER ERECTED 
1831. 
Thermometers. 
Water- 
Barometer. 
Tempera- 
ture of 
Mercurial 
Barometer. 
Water- 
Barometer 
reduced to 
Mercury. 
Difference. 
Elasticity 
of Vapour. 
Difference. 
In. 
Out. 
Mercury. 
March. 1 
o 
44 
o 
43-5 
Inches. 
398-94 
o 
48 
Inches. 
29-810 
Inches. 
Inch. 
Inch. 
Inch. 
2 
46*5 
46 
397-56 
50 
29-763 
3 
51-5 
51 
394-41 
53 
29-582 
4 
53 
52-5 
395-64 
54 
29-676 
5 
52-5 
52 
397-23 
55 
29-818 
6 
53 
53 
389-37 
55 
29-167 
7 
52 
51-5 
384-48 
54 
29-581 
8 
49 
48-5 
397-12 
53 
29-773 
9 
50 
50 
394-19 
53 
29-528 
10 
48 
48 
398-83 
50 
29-871 
11 
53-5 
53 
396-05 
54 
29-724 
12 
49‘5 
49 
398-94 
53 
29-907 
13 
50-5 
50 
394-99 
52 
29-632 
14 
50 
49-5 
395-42 
52 
29-644 
1 5 
48-5 
48 
397-20 
51 
29-767 
16 
52 
52 
394-50 
53 
29-566 
17 
54-5 
54 
396-88 
56 
do 
CTi 
18 
54-5 
54 
401-01 
55 
30-130 
19 
49 
49 
402-48 
51 
30-194 
20 
50 
50’5 
400-92 
45 
30-037 
21 
52‘5 
52 
400-18 
53 
30-044 
22 
51-5 
51-5 
402-42 
47 
30-199 
23 
48 
48 
404-55 
49 
30-347 
24 
44-5 
44 
401-02 
47 
30-031 
25 
44 
44 
396-11 
47 
29-656 
26 
46 
46 
391-73 
48 
29-342 
27 
49-5 
49 
397-82 
51 
29-838 
28 
51 
51 
399-74 
48 
29-994 
29 
50 
50*5 
401-41 
45 
30-127 
30 
48 
48 
403-08 
43 
30-232 
31 
47 
47 
404-82 
48 
30-352 
Means. . . . 
49-8 
49-5 
397-71 
50-8 
29-843 
29-191 
•652 
•400 
•252 
