[ 77 i ] 
Table fhewing the equation depending on the temperature of the column of air, and its elevation above the fea, as denoted by the mean height of quickfilver in the 
inferior and fuperior barometers. 
Mean 
equated height of quickfilver in the inferior and fuperior barometers. 
Equation in thoufandth parts of the logarithmic altitude. 
* 
Rate of di- 
minution for 
sfl-a 
Inches 
9 
20 
21 
22 
2 3 
24 
25 
26 
26| 
27 
271 
28 
28 i 
29 
292 
30 
3 ®l 
whole and 
half 'inches. 
92° 
3 
89.364 
95-456 
101.548 
107.640 
H 3-733 
119.825 
125.918 

132.010 

I 35-057 

138.103 

141.149 
_ 
144.195 

147.242 

150.288 
2.38 
153-334 
156.381 
159-427 
[ 6.0925 
T 3 
3 
*2 
1.44 
i -73 
2.0 3 
2.13 
2.18 
2.22 
2.27 
2.32 
2-37 
2.42 
2.47 
2.52 
2-57 
l 3.04625 
;§ 
8 2 
74.967 
80.078 
85.189 
O 
O 
c n 
6 
O' 
95 - 41 1 
100.522 
105.633 
• 
1 10.744 
— 
113.299 
— 
115-855 
— 
118.411 
— 
120.966 
— 
123.522 
— 
126.077 
— 
128.632 
— 
131.188 
— 
1 33-743 
r 5.111 
n 
1.49 
1.80 
2.10 
2.21 
2.26 
2.3I 
2.36 
2.41 
2.46 
2.51 
2.56 
2.61 
2.66 
L 2.5555 
•3 
72 
-£j 
60.028 
64.120 
68.213 
72-305 
— 
76.398 
80.491 
'84-583 
— 
88.675 
— 
90.722 
— 
92.768 
94.814 
— 
96.860 
— 
98.907 
— 
100 953 
102.999 
105.047 
— 
107.093 
— 
r 4.09250 
J 
’*5 
1.52 
1.83 
2.14 
2.25 
2.30 
2 -35 
2.40 
2.45 
2.51 
2.56 
2.61 
2.66 
271 
1 2.04625 
62 
jf 
44.818 
47-873 
50.928 
53-983 
57-°39 
60.094 
'63.150 
66.205 
— 
67-733 
— 
69.261 
70.789 
— 
72.316 
— 
73-844 
75-372 
— 
76.900 
— 
78.427 
— 
79-954 
j 3-°555 
0 
i -55 
1.87 
2.18 
2.29 
2.34 
*•39 
2-45 
2-50 
2-55 
2.60 
2.66 
2.71 
2.76 
1 !- 5 2 775 
4 > 
52 
0 
29-335 
1.49 
31335 
33-335 
35-355 
1.80 
37-335 
39-335 
41-335 
2.10 
43-335 
2.21 
44-335 
2.26 
45-335 
2.31 
46-335 
2.36 
47-335 
2.41 
48.335 
2.46 
49-335 
2.51 
5°-335 
2.56 
51-335 
2.61 j 
5 2 -335 
2.66 
f 2.000000 
( I. OOOOOO 
0 
42 
14.394 
25-376 
16.358 
17 - 34 ° 
— 
18.321 
i 9 - 3°3 
20.284 
— 
21.266 
— 
21-757 
— 
22. 248 
— 
22.739 
— 
23.229 
— 
23.720 
— 
24-2 1 1 
24.702 
— 
25-193 
— 
25.684 
— 
r O.981625 
TO 
3 
< 
1.44 
i -73 
2.O3 
2.13 
2.18 
2.22 
2.27 
2.32 
2-37 
2.42 
2.47 
2.52 
2-57 
j O.4908 1 2 
<1 
32 
When the mean temperature 
of the column of air to be m 
leafured is at 32 0 , the differences of the logarithms give the real height in 
fathoms and i-oooth parts. 
ol 
1 -39 
1.67 
i -95 
2.05 
2.09 
2.14 
2.19 
2.24 
i.z 8 
2 -33 
238 
2.42 
2.47 
. 
e 4 
22 
I 3-852 
H- 79 6 
1 5 - 74 I 
16.685 
— 
17.630 
i 8.575 
I 9 - 5 I 9 
20.463 
— 
20.936 
2 1 .408 
— 
21.880 
22-353 
22.825 
— 
23.297 
23 769 
— 
24.242 
— 
24.714 
1 O.47225 
£ 1 
i -33 
1.60 
1.88 
1.97 
2.01 
2.06 
2.10 
2.15 
2.19 
2.24 
2.28. 
2 *33 
2-37 
l O.94450 
12 
J 
2 J2 
27.162 
29.014 
30.866 
32.718 
.34 569 
36.421 
38.273 
40.125 
41.651 
41.976 
42.902 
~ 
43.828 
44-754 
45.680 
2.17 
46.606 
47*53 2 
48.458 
| O.925875 
11-85175 
I. Compu- 
