I 22 
RESEARCHES IN STELLAR PHOTOMETRY. 
Table 73.—7220 S Cygni. Photometer Measures of Comparison Stars. —Continued. 
1905 November 18. 40-inch, WEDGE V. Good. 
Sidereal 
Time. 
j 
Zen. 
Dist. 
Star. 
Scale Readings. 
Mean Scale Readings 
C. 
Magnitude. 
Mean of 3. 
Mean of 6. 
H. 
P. 
h m 
6 30 
X 
19.3 20.1 20.0 
19.80 
19 25 
1 .62 
n -95 
12.20 
y 
42.0 42.8 44.2 
43.00 
42.10 
4.01 
14-34 
14-59 
b 
54.1 56.6 53.1 
54.60 
54 04 
5 15 
1548 
15-73 
y 
21.0 20.7 20.7 
20.80 
20.86 
1.80 
12.13 
12.38 
a 
40.5 40.1 40.1 
40 43 
39 76 
3-75 
14.08 
14 33 
0 
15-5 15 9 15 8 
1573 
I 5-36 
1 . 16 
11.49 
11.74 
t 
33.6 32.1 32.S 
32.83 
32.46 
2.90 
13 23 
I 3-48 
t 
32.1 32.0 32.2 
32.10 
0 
14.0 15.7 15.3 
15.00 
a 
36.8 41.3 39.8 
39 • 30 
y 
20.8 20.9 21. 1 
20.93 
& 
52.1 53.7 54.6 
53-47 
y 
39.9 42.3 41.4 
41.20 
6 50 
X 
18.7 18.3 19.1 
18.70 
Table 74.— 7220 S Cygni. Constants for Reduction and Comparison with Catalogue Magnitudes. 
6-INCH. 
1904 September 3. 
1904 September 5. 
1904 October 1. 
Star. 
Obs. Mag. 
A Mag. 
Obs. Mag. 
A Mag. 
Obs. Mag. 
A Mag. 
C. 
C. 
C. 
H. 
P. 
H. 
P. 
H. 
P. 
H. 
P. 
H. 
P. 
H. 
P. 
B 
0.30 
723 
7.48 
+ • 15 
4- 01 
0-34 
7-30 
7-55 
4 -. 22 
4 - .08 
0-45 
7-33 
7-58 
4 - .25 
4 - .11 
C 
0.51 
7-44 
7.69 
- -44 
- .27 
0.65 
7.61 
7.86 
- -27 
— . 10 
0.67 
7-55 
7.80 
- -33 
— . 16 
D 
0.40 
7-33 
7-58 
4 - .29 
4 - . 26 
0.12 
7.08 
7-33 
4 - .04 
4 - 01 
0.22 
7.10 
7-35 
4 - .06 
4 - .03 
Means 
Mo. . . 
0.40 
7-33 
6-93 
7-58 
7.18 
± .29 
±.18 
0-37 
7-33 
6.96 
7-58 
7.21 
±.18 
± 06 
0-45 
7-33 
6.88 
7-58 
7-13 
± .21 
± -10 
12 -INCH- 
40 -INCH. 
Star. 
Mag. 
6-inch- 
C- 
Star. 
Mag. 
12-inch. 
C. 
Aug. 13. 
Oct. 28- 
Oct. 31. 
Nov. 3. 
Jan.3. 
Aug. 30. 
Sept. 13. 
c . 
d . 
e . 
/. 
T . 
Mean C . . . 
Mean Mag. 
M 0 . 
8.60 
9 03 
9.26 
9-79 
8-97 
1.41 
2.02 
2-37 
2.85 
1.96 
0.64 
0-95 
1.49 
i -97 
0.83 
0-53 
0.94 
1.28 
1.74 
0-75 
/. 
. m . 
0 . 
x . 
Mean C... 
Mean Mag. 
M 0 . 
10.53 
10.73 
11.32 
H -95 
2 - 57 
3 - 45 
369 
1.15 
2.01 
2.27 
1- 35 
2.16 
2 - 43 
0 59 
0.82 
1.77 
2-33 
9-13 
2.12 
9 -13 
7.01 
1.18 
9 -13 
7-95 
1.05 
913 
8.08 
11.13 
3 24 
H -33 
8.09 
1.81 
u -33 
9-52 
1.98 
”•33 
9-35 
1.47 
11.13 
9.66 
