researches in steeear photometry. 
i 68 
Table 104.—8518 Z Cassiopeia. Mean Magnitudes op Comparison Stars. 
6-INCH. 
September 5. 
October 1. 
October 5. 
October 27. 
Mean. 
Star. 
Mag. 
J Mag. 
Mag. 
J Mag. 
Mag. 
J Mag. 
Mag. 
A Mag. 
Mag. H. 
Mag. P. 
A Mag. 
A . . 
6.80 
+ 0.04 
6-75 
— 0.01 
6.80 
4-0.04 
6.68 
— 0.08 
6.76 
6.65 
±0.04 
D .. 
7.19 
-0.05 
7.26 
+ 0.02 
7.20 
— 0.04 
7-32 
4-0.08 
7.24 
7-13 
±0.05 
Mean 
7.00 
6.89 
±0.04 
a. . . 
8.48 
+ 0.19 
8-34 
4-0.05 
8.15 
— 0.14 
8.18 
— 0.11 
8.29 
8.18 
±0.12 
b.... 
9.46 
— 0.09 
9-74 
4-0.19 
9-50 
-0.05 
9 .50 
-0.05 
9-55 
9-44 
±0.09 
d... 
11.13 
-bo. 08 
10.96 
— 0.09 
11.10 
-fo.05 
11.02 
-0.03 
11.05 
10.94 
±0.06 
h... 
10.96 
+ 0.05 
10-95 
4-0.04 
10.85 
— 0.06 
10.88 
-0.03 
10.91 
10.80 
±0.04 
Mean 
E... 
9-95 
8.04 
9.84 
7-93 
±0.08 
±0.08 
8.15 
+ 0.11 
8.07 
4-0.03 
8.06 
4-0.02 
7.90 
— 0.14 
12-INCH. 
September 11. 
November 2. 
November 3. 
Mean. 
Star. 
Mag. 
A Mag. 
Mag. 
J Mag. 
Mag. 
J Mag. 
Mag. 
A Mag. 
Mag. H. 
Mag. P. 
A Mag. 
a. .. 
8-33 
+ 0.01 
8.38 
4-0.06 
8.25 
— 0.07 
8.32 
8.21 
±0.05 
b... . 
9.82 
+ 0.03 
9.81 
4-0.02 
9-74 
-0.05 
9-79 
9.68 
±0.03 
d. . . 
10.96 
+ 0.02 
10.93 
— 0.01 
10.92 
— 0.02 
10.94 
10.83 
±0.02 
h ... 
10.70 
-0.05 
10.68 
— 0.07 
10.87 
4-0.12 
10.75 
10.64 
±0.08 
Mean 
9-95 
9.84 
±0.04 
12.18 
— 0.07 
12.26 
4-0.01 
12.32 
4-0.07 
12.25 
12.14 
±0.05 
n -93 
— 0.04 
11.97 
0.00 
12.02 
4-0.05 
11.97 
11.86 
±0.03 
g.. . . 
k. . . 
12.94 
-0.05 
13.18 
4-0.19 
12.86 
-0.13 
12.99 
12.88 
±0.12 
Mean 
12.40 
12.29 
±0.07 
4 
40 -INCH. 
Star. 
January 3. 
January 7. 
July 
12. 
October 24. 
Mean. 
Mag. 
J Mag. 
Mag. 
J Mag. 
Mag. 
A Mag. 
Mag. 
A Mag. 
Mag. H. 
Mag. P. 
A Mag. 
d... 
10.87 
— 0.12 
11.10 
4-0.12 
10.98 
10.87 
±0.12 
e ... 
h. .. 
12-35 
+ 0.03 
12.31 
— 0.01 
12.51 
10.54 
4 -o. 19 
12.11 
— 0.21 
12.32 
(10.54 
12.21 
10.43) 
±0.11 
12.82 
k. .. 
12.79 
— 0. 10 
— 0.07 
13.01 
4-0.12 
12.94 
-fo.05 
12.89 
12.78 
±0.08 
g.... 
12.06 
— 0.04 
12.08 
— 0.02 
.... 
12.16 
4-0.06 
12 . JO 
11.99 
±0.04 
Mean 
±0.06 
n . . 
13-91 
-6.05 
13-94 
— 0.02 
. . . . 
14.04 
4 -o.o 8 
13.96 
13-85 
±0.05 
p •• 
13-58 
— 0.06 
13.62 
— 0.02 
. 
1372 
-fo.08 
13.64 
13-53 
±0.05 
q.... 
13-76 
+ 0.04 
1376 
-fo.04 
13.69 
-0.03 
13.67 
-0.05 
13-72 
13.61 
±0.04 
X. . . 
13-38 
(13-38 
13-27) 
0... . 
13.96 
(13-96 
13-85) 
Mean 
±0.05 
