iron arising Jrom its rotation. 
409 
Table of the values of^', 9, and 9' — 9, computed from the equations (9^) (10/,) 
compared with their observed values in Table B. 
X 
6' 
9 '— e, 
Observed. 
Computed. 
Difference. 
Observed. 
Computed. 
Difference. 
Observed. 
Computed. 
Difference. 
0 
0 
/ // 
“ / « 
0 
f 
0/1/ 
0 
/ 
// 
0 
/ 
// 
0 
•^ / // 
0 
/ 
u 
0 
+ 
50 28 
+ 50 01 
— 
0 
27 
— 50 28 
50 
01 
+ 
0 
27 
I 
40 56 
1 40 02 
— 
0 
54 
10 
4 
30 50 
4 24 43 
— 
6 
07 
2 54 52 
2 
49 
34 
— 
5 
18 
I 
35 58 
I 35 09 
— 
0 
49 
20 
7 
38 05 
7 27 24 
— 
10 
41 
6 15 27 
6 
06 
04 
— 
9 
23 
I 
22 38 
I 21 20 
— 
I 
1 8 
30 
10 
07 50 
9 36 27 
3 » 
23 
9 03 ^2 
8 
35 
29 
— 
27 
43 
1 
04 38 
I 00 58 
— 
3 
40 
40 
1 1 
02 12 
10 37 47 

24 
25 
10 23 37 
10 
00 
58 
— 
22 
39 
38 35 
36 49 
— 
I 
46 
50 
10 
44 55 
1025 II 
19 
44 
10 32 35 
10 
13 
35 
— 
19 
00 
12 20 
11 36 
— 
0 
44 
60 
9 
12 10 
^ 59 55 
1 2 
15 
9 24 40 
9 
12 
06 
— 
1 2 
34 
— 
12 30 
— 12 n 
+ 
0 
19 
70 
6 
33 52 
6 30 47 
3 
05 
7 06 20 
7 
02 
48 
— 
3 
32 
— 
32 28 
— 32 01 
4 
0 
27 
80 
3 
lo 50 
3 14 3 ‘ 
+ 
3 
41 
3 56 00 
3 
59 
50 
+ 
3 
50 
— 
45 *0 
— 45 19 
0 
09 
90 
’ 
24 49 
— 25 01 
r 
0 
12 
+ 24 49 
4 
25 
01 
+ 
0 
12 
49 38 
— 50 02 
0 
24 
The agreement between the computed and observed values 
of also of and ft, in the first table is such, that had I 
been assured of the correctness of the formulas, I should cer- 
tainly not have expected it to be more perfect. In the second 
table, the agreement between the computed and observed 
values of ft' — ft, is equally close, but there is a greater differ- 
ence between those values of the angles ft', ft, themselves. 
In determining the value of from the observation when 
x=:54° 45', and ft' = ft,, I had in the first instance in conse- 
quence of an error in computation, found it 47 instead of 
48, and having computed the several values of ft' and ft, from 
this value of — , I found that the difference between these 
and the observed values was less than 8', except in two in- 
stances, in one of which it amounted to 11' and in the other 
to 19'. Now the observations when x = 5o® and x = 60° 
would give the value of even less than 47®, as will be 
