OBSERVATIONS IN FOUR BALLOON ASCENTS. 
329 
Table I. (Continued.) 
reenwich 
jan Time. 
Barometer. 
Height 
above 
sea- 
level. 
Dry and Wet Thermometers, aspirated. 
Temperature cor- 
rected for change. 
I Dry and Wet Thermometers, ./ree. 
Regnault’s 
Hygrometer. 
Therm. 
Reading 
corrected. 
Dry. 
Wet. 
DiflF. 
Tension of 
vapour. 
Relative 
humidity. 
Dew- 
point. 
Dry. 
Wet. 
Diff. 
Tension of 
vapour. 
Relative 
humidity. 
Dew- 
point. 
Dew- 
point. 
Tension of 
vapour. 
h m 
S 
in. 
feet 
O 
in. 
O 
O 
O 
O 
in. 
O 
in. 
'6 56 
0 
14-91 
18,590 
9-5 
6-5 
3-0 
-063 
72 
0-8 
14-6 
56 
15 
14-88t 
18,650 
57 
0 
14-76 
18,870 
9-9 
6-7 
3-2 
-063 
71 
0-8 
15*1 
12-4 
7-7 
4-7 
•058 
59 
— 1-4 
57 
30 
9*7 
6-6 
3-1 
-063 
72 
0-8 
14-9 
12-4 
7-4 
5*0 
•055 
56 
— 2-8 
58 
0 
14-65 
19,070 
10-1 
7-1 
3-0 
-065 
73 
1-6 
15-3 
12*1 
8-0 
4-1 
•062 
64 
-f 0-4 
58 
30 
14-68t! 
19,000 
59 
0 
14-61 j 
19,100 
8-3 
6*3 
2-0 
-067 
80 
2-4 
13-6 
59 
0, 
14-66t 
19,010 
7 0 
0| 
14-69t, 
19,000 
10-5 
7*5 
3-0 
-066 
73 
2-0 
15-8 
'2 47 
0 
29-73 
280 
57-3 
50-6 
6-7 
-305 
64 
44-1 
57-3 
48 
0 
29-34 
640 
55-7 
50-0 
5-7 
-309 
68 
44-5 
55-7 
48 
30 
62-2 
29-12 
850 
54-8 
49-6 
5-2 
-310 
70 
44-6 
54-8 
49 
0, 
28-97 
990 
54-3 
49*1 
5-2 
-304 
70 
44-0 
54-3 
54-6 
49-4 
5-2 
•308 
71 
44-4 
49 
301 
28-82 i 
1,130 
53-6 
48-6 
5-0 
-301 
71 
43-7 
53-6 
53-7 
48-7 
5-0 
•302 
71 
43-8 
50 
0 
28-50 : 
1,440 
52-4 
48-0 
4-4 
-301 
74 
43-7 
52-4 
52-6 
48-2 
4-4 
•303 
74 
43-9 
51 
0 
28-05 
1,880 
50-3 
46*4 
3-9 
-288 
76 
42-5 
50-3 
50-3 
46*5 
3-8 
•290 
77 
42-7 
51 
30 
49-8 
46-0 
3-8 
-285 
77 
42-2 
4.9-8 
52 
0 
27-61 
2,310 
49-3 
46-1 
3-2 
-293 
81 
43-0 
49-3 
49-6 
46-3 
3-3 
•294 
80 
43-1 
53 
0 
27-25 
2,670 
49-5 
48-6 
0-9 
-346 
94 
47-8 
49-5 
50-0 
48-7 
1-3 
•343 
92 
47-5 
53 
35 
50-4 
49-4 
1-0 
•355 
94 
48-5 
54 
0 
27-10 
2,820 
51-0 
50-0 
1-0 
-363 
94 
49-2 
51-0 
51-4 
50-7 
0-7 
•375 
96 
50-1 
55 
0 
26-95 
2,980 
51-1 
50*6 
0-5 
-376 
97 
50-2 
51-1 
51-7 
51-4 
0-3 
•388 
98 
51-1 
56 
0 
59-0 
26-83 
3,100 
50-7 
50-5 
0-2 
-378 
99 
50-4 
50-7 
30 
51-7 
51-0 
0-7 
•379 
96 
50-5 
57 
0 
26-67 
3,260 
51-6 
50-9 
0-7 
•378 
96 
50-4 
0 
26-52 
3 420 
50-1 
50-1 
0-0 
*374 
100 
50-1 
50-1 
48-0 
•349 
3 0 
0 
26-19 
3,760 
50-7 
50-1 
0-6 
-368 
96 
49-6 
50-7 
0 
35 
51-3 
50-2 
1-1 
-365 
93 
49-3 
51-3 
1 
0 
25-96 
4,010 
51-7 
50-1 
1-6 
-359 
91 
48-9 
51-7 
54*1 
51-0 
3-1 
•355 
83 
48-5 
1 
30 
60-6 
25-84 
4,140 
52-3 
49*9 
2-4 
-348 
86 
48-0 
52-3 
2 
0 
25*73 
4,260 
53-8 
50-3 
3-5 
•343 
81 
47-5 
2 
30 
25-55 
4,450 
52-1 
49-3 
2-8 
-337 
84 
47-0 
52-2 
3 
0 
25-48 
4,520 
52-0 
49-1 
2-9 
-334 
83 
46-8 
52-1 
52-6 
49-1 
3-5 
•328 
80 
46-2 
4 
0 
25-07 
4,960 
50-3 
45-9 
4-4 
-282 
75 
41-9 
50-4 
52-0 
46-4 
5*6 
•276 
69 
41-3 
4 
35 
49-9 
45*0 
4-9 
-268 
72 
40-4 
50-0 
51-4 
45-6 
5-8 
•266 
68 
40-2 
5 
0 
58-5 
24-70 
5,370 
49-6 
44-5 
5-1 
-261 
71 
39-7 
49-8 
50-6 
45-0 
5-6 
•261 
68 
39*7 
5 
30 
48-9 
44-0 
4-9 
-258 
72 
39-3 
49-1 
6 
0 
24-38 
5,710 
48-1 
43-5 
4-6 
-255 
73 
39-0 
48-3 
49-2 
43-7 
5-5 
•249 
69 
38-3 
6 
30 
47-3 
42-8 
4-5 
-250 
73 
38-4 
47-5 
6 
40 
24-08 
6,050 
7 
0 
23-95 
6,190 
46-6 
42-3 
4-3 
-247 
74 
38-1 
46-8 
7 
30 
46-3 
42-0 
4-3 
-245 
75 
37-9 
46-5 
8 
0 
23-46 
6,750 
44-9 
40-6 
4-3 
-231 
74 
36-2 
45-2 
45-9 
41-1 
4-8 
•232 
72 
36-3 
9 
0 
23-29 
6,940 
44*5 
39-0 
5-5 
-206 
67 
32-9 
44-8 
10 
0 
55-0 
7,380 
44-3 
37-9 
6-4 
*189 
61 
30-5 
44-6 
27-0 
•167 
11 
0 
22-73 
7,590 
42-9 
36-2 
6-7 
*173 
59 
28-1 
43-3 
11 
30 
53-6 
22-49 
! 7,880 
42-4 
34-7 
7*7 
-153 
53 
24-7 
42-8 
12 
0 
22-31 
8,090 
41-6 
34-2 
7*4 
-152 
55 
24-5 
42-0 
12 
40 
40-8 
33-8 
7*0 
-153 
57 
24-7 
41-2 
42-7 
34-8 
7-9 
•153 
53 
24-7 
13 
0 
22-07 
8,370 
40-0 
32-9 
7*1 
-146 
55 
23-4 
40-4 
39-6 
32-7 
6-9 
•146 
56 
23-4 
13 
30 
39-6 
32-4 
7-2 
-142 
55 
22-6 
40-1 
14 
30 
21-46 
9,110 
37-8 
30-8 
7-0 
-139 
57 
22-0 
38-3 
15 
0 
21-31 
9,290 
36-7 
30-6 
6-1 
-145 
62 
23-2 
37-2 
36-7 
30-4 
6-3 
•142 
60 
22-6 
16 
0 
21-08 
9,550 
35-7 
30-9 
4-8 
-157 
69 
25-4 
36-2 
37-1 
31*2 
5-9 
•151 
63 
24-3 
17 
0 
20-78 
9,950 
34-5 
29-8 
4-7 
-150 
69 
24-1 
35-1 
35-6 
30-1 
5-5 
•147 
65 
23-6 
17 
30 
33-8 
29-4 
4-4 
*150 
71 
24-1 
34-4 
18 
0 
20-54 
10,240 
32-7 
28-9 
3-8 
-151 
74 
24-3 
33-3 
33-9 
28-7 
5-2 
•140 
66 
22-2 
18 
30 
1 
32-1 
28-4 
3-7 
-149 
74 
23-9 
32-7 
20-0 
•129 
2x2 
