5Q0 Sir george shuckburgh’s Observations 
table xv. For the expanfion of the ah, or correc- 
tion of the uppermoft height, fee p. 576. 
i 
Deg- 
- 
Approximate height in feet 
• 
- 
O 
1000. 
2000. 
3000. 
4OOO. ! 
1 
I 5 °°°- 
6000. | 
7000. 
8000. ‘ 
9000. 
I 
2.4 
4.9 
7-3 
9-7 
12-1 
146 
17.0 
19.4 
21.9 
2 
4.9 
9-7 
14.6 
194 
2 4-3 
29.2 
34 0 
38-9 
43-7 
3 
- 7 - 3 ' 
14.6 
21.9 
29.2 
3 6 -4 
| 43-7 
5 x -° 
58.3 
65.6 
4 
9-7 
19.4 
29.2 
38.9 
48.6 
58 3 
68.0 
77.8 
87-5 
5 
12. 1 
24-3 
3 6 -4 
48.6 
60.7 
72.9 
85.0 
97.2 
I0 9*3 
6 
14.6 
29.2 
43-7 
58.3 
72.8 
87-5 
102.0 
1 16.6 
I 3 1,2 
7 
17.0 
34 -° 
51.0 
68.0 
85.° 
102. 1 
1 19.0 
136.1 
i 53 ° 
8 
19.4 
38.9 
58-3 
77.8 
9 - 7 - 1 
1 16.6 
136.0 
* 55-5 
174.9 
9 
21.9 
43-7 
63.6 
8 7-5 
I0 9*3 
I 3 1 - 2 
i 53 ° 
I 75 - 0 
196.8 
10 
24-3 
48,6 
72.9 
97.2 
121.5 
i 45 8 
170. 1 
194.4 
218.7 
u 
26.7 
53-5 
80.2 
106.9 
!33 6 
160.4 
187.1 
213 8 
240.6 
12 
29.2 
58-3 
■87-5 
I l6.6 
145.8 
* 75-0 
204.1 
233-3 
262 4 
*3 
3 1 - 6 
63.2 
94.8 
126.4 
!5 7-9 
1 89 5 
221. 1 
252.7 
284.3 
14 
34 -o 
68.0 
102. 1 
136.1 
I70.I 
204.1 
238.1 
272.2 
306.2 
i 5 
3 6 -4 
72.9 
I0 9-3 
145.8 
l82.2 
218.7 
255 - 1 
291.6 
328.0 
16 
38.8 
77.8 
1 16.6 
JS 5-5 
194*3 
2 33-3 
272.1 
3 ‘LO 
349*9 
- H 
41*3 
82.6 
123.9 
165.2 
206.5 
247.9 
289.1 
33°-5 
371-7 
18 
43-7 
87.5 
131.2 
i 75 -o 
2 1 8.6 
262.4 
s°6. 1 
349 9 
393 * 6 
19 
46.1 
9^-3 
* 3 8 -5 
184.7 
230.8 
277.0 
3 2 3 - J 
3 ^ 9-4 
4 I 5*5 
20 
48.6 
97.2 
145.8 
194.4 
243 o 
291.6 
340.2 
388 8 
437*4 | 
21 
5 1 -° 
102.1 
204.1 
2 55 - 1 
306.2 
357 - 2 
408.2 
459*3 
22 
53*5 
106 9 
160.4: 
213.8 
267.3 
320.8 
374 2 
427.7 1 481.I 
2 3 ’ 
55*9 
III $ 
167.7 
223.6 
279.4 
335*3 
391.2 
447 1 
5 ° 3 .o 
24 
58.3 
I l6*6 
I 75 -° 
2 33*3 
291 6 
349-9 
408.2 
466.6 I 
524-9 
25 
60.7 
121 . S 
i8o.2 
243.0 
3 ° 3-7 
3 6 4 5 
42S 2 
48 6 0 J 
54^-7 ! 
TABLE 
