134 ASTRONOMY: A. VAN MA AN EN 
The plates were measured with the monocular arrangement of the 
stereocomparator and reduced in exactly the same way as described 
in The Photographic Determination of Stellar Parallaxes with the 60-inch 
Reflector.^ The eight pairs of plates with the necessary details are 
N. G. C. 7662. PHOTOGRAPHED WITH THE 80-FOOT FOCUS ARRANGEMENT OF THE 60-INCH 
REFLECTOR, NOVEMBER 4, 1915. EXPOSURE 30 MINUTES, SEED 23 PLATE. SCALE 1 MM. = 
i:'6; ENLARGEMENT FROM ORIGINAL NEGATIVE, 5.3 DIAMETERS. 
TABLE 1 
N. G. C. 7662 
a = 23h2l"i6S 
6 
= 41°59' (1900) 
Plate No. 
Date 
I 
Obs. 
Qy- 
P 
m 
Remarks 
1915 
749 
November 
2 
- 7?7 
vM 
f 
-0.699 
+0 
84 
Hazy, 30"^ exp. 
750 
2 
+ 3.0 
H 
fg 
-0.699 
+0 
84 
Hazy, 30 exp. 
758 
4 
-13.2 
H 
fg 
-0.719 
+0 
85 
30"^ exp. trail of Boss 6602 
759 
1916 
4 
- 2.7 
vM 
fg 
-0.719 
+0 
85 
30"^ exp. 
1050 
July 
23 
- 5.7 
H 
f 
+0.701 
+1 
56 
1061 
August 
3 
-14.2 
H 
f 
+0.574 
+1 
59 
1062 
3 
- 7.0 
vM 
f 
+0.574 
+1 
59 
1063 
3 
+ 1.2 
H 
f 
+0.574 
+1 
59 
1079 
5 
- 6.5 
H 
fg 
+0.549 
+1 
60 
1080 
5 
0.0 
vM 
fg 
+0.549 
+1 
60 
1081 
5 
+ 8.2 
H 
g 
+0.549 
+1 
60 
1082 
5 
+ 15.0 
vM 
g 
+0.549 
+1 
60 
1126 
October 
21 
0.0 
vM 
f 
-0.575 
+1 
81 
1127 
21 
+ 8.7 
H 
fg 
-0.575 
+1 
81 
30"^ exp. 
1143 
November 
16 
+ 4.5 
vM 
g 
-0.822 
+1 
88 
Clouds, 28^" exp. 
1163 
17 
- 5.5 
H 
fg 
-0.827 
+1 
88 
Hazy, 35"^ exp. 
