454 Mr. South on the discordances between the 
Table V. 
To show the difference between the Sun’s observed and computed 
Right Ascensions ; (by Blackman-street observations). 
1821. 
Sun’s R. A. observed when 
on the meridian of Black- 
man-street Observatory. 
Sun’s R. A. computed for 
the meridian of Blackman- 
street Observatory. 
Diff. of the 
observed and 
comp. R A. 
<L> 4-1 <1> 
h. m. s. 
h. m. s. 
s 
■5 § 
, June 30 
6 36 4.397 
6 36 3 563 
+ 0.834 
^ * 
00 -O 
July 9 
7 13 9-388 
7 13 8.462 
0.926 
C T? w (l> 
O <L> Xl 
j 22 
7 2; 23.867 
7 25 23.062 
0 805 
^ C ^ aj 
| 18 
7 49 40.623 
7 49 39 - 5 61 
1.062 
C ^ <u 
19 
7 53 41-539 
7 53 4 °- 5 61 
0.978 
-a _ 
August 3 
8 52 49 015 
8 52 48 259 
0.756 
co U* 
f 0 5 xg 
4 
8 56 40 613 
8 5 6 39-959 
0654 
24 f 2 e 
20 
9 19 38.255 
9 «9 37-358 
0 897 
| "S K 
1 ! 1 
9 23 25.529 
9 23 24.758 
c- 77 1 
boi s' 0- ? 
! * 7 
9 45 58 55 1 
9 45 57-957 
0.594 
£ H v-Q 4- 
20 
9 57 8.647 
9 57 7657 
0.990 
- /> s 2 
j? .E ■£ us <j=s 
I 21 
10 0 50.790 
10 0 50.057 
0 733 
H 
1 22 
10 4 32.711 
10 4 31.956 
0-755 
exposed 
I 2 3 
io 8 14 109 
10 8 13356 
0-753 
exposed 
24 
10 u 55.135 
10 11 54.456 
0.679 
exposed 
September 2 
ro 44 47 316 
10 44 46.655 
0661 
defended 
3 
10 48 24 727 
10 48 24..055 
0.672 
exposed 
4 
10 52 1 916 
10 52 1-255 
0.661 
defended 
5 
10 55 38 815 
10 55 38.155 
0 660 
exposed 
12 
11 20 51.458 
11 20 50.655 
0.803 
defended 
15 
11 31 37.636 
11 31 36.955 
0.681 
defended 
16 
11 35 13.163 
is 35 12.355 
0.808 
defended 
24 
12 3 57.928 
12 3 57.155 
0-773 
defended 
2 5 
12 7 33.956 
*2 7 33-255 
0.701 
exposed 
October 2 
12 32 52.451 
12 32 51 656 
0.795 
defended 
21 
13 43 7.287 
13 43 6.558 
0.729 
exposed 
22 
13 46 S 4 - 79 8 
13 46 54.158 
0.640 
exposed 
29 
14 13 47.288 
14 13 46.759 
0.529 
defended 
3 ° 
14 17 40.668 
14 17 40.060 
0.608 
defended 
November 6 
14 45 15.827 
14 45 15.261 
0.566 
defended 
December 2 
16 33 38.642 
16 33 38-066 
0.576 
defended 
4 
16 42 19.690 
16 42 19.067 
0.623 
defended 
5 
16 46 40.890 
16 46 40.467 
0.423 
defended 
6 
16 51 2.831 
16 51 2.267 
0.564 
defended 
8 
16 59 48.020 
16 59 47.567 
o .453 
defended 
1 1 
17 12 59.370 
17 12 58.867 
+ 0.503 
defended 
Mean by 36 obs, r: 
4- 0.712 
Note; wherever the word “ defended” is annexed to the column of differences, 
in this, and the following tables, it means, that every part of the instrument, except 
the object-glass, was entirely excluded from the sun’s rays, during the day of obser- 
vation ; as were also the side plates and stone piers. 
