14 
schel’s six Catalogues of Stars observed with the 20 foot 
reflector, and his two Catalogues of Double Stars measured 
with the 7 foot equatorial, which are printed in the earlier 
volumes of the Memoirs of the Royal Astronomical Society. 
The method of procedure was the same as that adopted in 
the former investigation. The magnitude assigned by Sir 
J ohn Herschel to each star common to the two observers was 
tabulated under the magnitude assigned to it by Admiral 
Smyth, and the mean taken. The results thus obtained were 
equalized by Sir John Herschel’s formula (Mem. R.A.S., vol. 
iii, p. 179) and the corrected and uncorrected results, together 
with the number of comparisons on which each depends, are 
given in the following Table. 
Table. 
Mag. 
Sm. 
Mag. 
H. 
No. of 
Obs. 
Mag. 
H. 
Corrected 
No. of 
Obs. 
1 
1*05 
6 
1-05 
6 
1*5 
1-62 
8 
2 
2-20 
5 
2-25 
2 
2-5 
2*7 
3 
2*59 
15 
3 
3*0 
10 
3-04 
23 
3-5 
3*6 
10 
3-67 
45 
4 
4*3 
25 
4-28 
53 
4-5 
4-9 
18 
4-87 
75 
5 
5-4 
32 
5-28 
88 
5-5 
5-6 
38 
5-85 
135 
6 
6*5 
65 
6-40 
132 
6*5 
7-0 
29 
6-98 
135 
7 
7*4 
41 
7-36 
112 
7-5 
7-7 
42 
7*76 
136 
8 
8*1 
53 
8*18 
125 
8*5 
8-8 
30 
8*76 
120 
9 
9*5 
37 
9*47 
85 
9-5 
10*2 
18 
10-05 
79 
10 
10*5 
24 
10-44 
60 
11 
11*1 
18 
11-25 
56 
12 
11-9 
14 
11-72 
58 
13 
12-3 
26 
12-48 
55 
14 
13*2 
15 
13-27 
53 
15 
14-4 
12 
14-46 
40 
16 
15-9 
13 
15-90 j 
13 
