322 
Dr. Brinkley’s results of the application of 
Table III. 
Index Correction. 
Face East. 
Face Wes 
1825. 
July 22 
5+87 
54,80 
24 
58,02 
54,64 
25 
55,65 
54,26 
27 
56,35 
53,81 
28 
56,04 
53,18 
P.M. 
59,28 
55 + 2 
30 
55 , 3 * 
52,98 
31 
5 9 , 1 6 
52,90 
Aug. 2 
55,37 
3 
56,40 
5+96 
4 
55,20 
5 
54,89 
6 
54,32 
7 
53,93 
8 
54,95 
9 
55,50 
P.M. 

55,93 
10 
56,38 
P.M. 
56,26 
1 1 
53,60 
Index correction. 
Face East. 
Face West. 
Several days of high wind. 
16 
55,40 
*7 
58,02 
18 
55,20 
*9 
53,50 
20 
54,08 
21 
56,50 
Means 
— 56,30 
+ 54+6 
Adjusted plumb-line dot, by 
which the index correction is 
necessarily affected. Cleaned 
mercury, &c. 
Aug. 26 
59,08 
56,1 1 
27 
56,58 
56,56 
28 
57,80 
55,23 
29 
56,30 
55 , 8 o 
Means 
— 57,44 
+ 55,92 
Aug.29 P.M. 
61,36 
Aug.29 P.M. 
30 
3 1 
P.M. 
Sept. 1 
2 
P.M. 
3 
4 
5 
6 
7 
8 
2 days of sto 
10 
1 1 
H 
2 1 
22 
Oct. 
27 
28 
1 
7 
rm 
Mean 
60,70 
60,44 
60,77 
60,01 
60,25 
58,92 
59>77 
59*97 
58,62 
58,98 
60,72 
59>°8 
59 > 7 ° 
59>45 
60,18 
6 1 .53 
59,9* 
62.28 
60.53 
58.29 
5 8 >57 
59>°3 
+ 59,90 
Took off plumb-line, and 
cleaned notch. 
Reversed circle, which re- 
mained with face west till 
Oct. 7. 
Index correction. 
Thick Wire. 
Fine Wire. 
Reversed Circle, face now East. 
Oct. 7 
13 
H 
>5 
*7 
21 
22 
24 
27 
28 
29 
Nov. 4 
7 
9 
1 1 
Means 
59 , 2 i 
59,80 
58,30 
5 8 ,35 
57,84 
58,90 
59,60 
58,58 
60,00 
58,76 
58,09 
58,88 
59 > 10 
60,93 
60,33 
J 5,63 
*5,7° 
j 4,67 
*4,65 
15,28 
15,15 
i 5> 8 5 
16,08 
14,78 
*5,33 
13,87 
* 4,23 
- 59 , >i 
+ 15,10 
* From this time the collimator was 
always lifted from the mercury, and re- 
placed before the observation. 
Reversed Circle, face now West. 
Nov.11 59,00 14,98 
14 58,62 14,80 
P. M. 58,70 14,86 
17 59,16 14,70 
19 58,86 14,75 
25 58,7° 14,67 
30 57,88 15,61 
Dec. 2 58,80 15,18 
Cleaned Mercury. 
2 57,9° 15,55 
Means 
+ 5 8,62 
—15,01 
