344 
PRELIMINARY GENERAL CATALOGUE OF STARS FOR 1900 
(18) Albany 00, Manuscript-catalogue. The weights in right-ascension, after a very careful 
discussion, were tabulated as follows: 
1 obs. 
2 obs. 
3 obs. 
4 obs. 
— 21° to — 29 0 
•7 
I -5 
2.0 
2-5 
- 3 ° 0 
.6 
1.0 
2.0 
2*5 
31 
.6 
1.0 
2.0 
2-5 
32 
.6 
1.0 
i -5 
2.0 
33 
•5 
1.0 
i -5 
2.0 
34 
•5 
1.0 
i -5 
2.0 
35 
•4 
1.0 
1.0 
1-5 
36 
•4 
•7 
1.0 
1-5 
37 
•3 
.6 
1.0 
1.0 
38 
•3 
•5 
•7 
1.0 
39 
.2 
•4 
.6 
•7 
40 
•i 5 
•3 
•4 
.6 
4 i 
.07 
•i 5 
.2 
•3 
These weights apply to observations in a single clamp, and were summed for the two clamps. 
Up to 4 observations, however, the table applies sufficiently well if the argument be total number of 
observations, irrespective of the number in each clamp. 
(19) Lick 1900. These weights apply to the observations of Piazzi stars south of the Equator. 
For 16 observations of circumpolar stars the adopted weight is 5.0. 
(20) Pulk 45. From declinations + 55 0 to -f 65°, one half these weights in declination apply. 
Special Z. D. factors are employed as follows: 
At Decl. 
Multiply Weight by 
0 
+10 
.8 
0 
.6 
—10 
•4 
-15 
•25 
(21) Pulk 55. By far the most frequently occurring number of observations in this Catalogue 
is 4, and for this the weight in declination was computed to be .8. This weight was employed. 
(22) Pulk 65 and Pulk 85. For these two Catalogues the weights are modified in the same way. 
From declinations + 55 0 to + 65°, the weights should be multiplied by .5; and as follows at the 
respective declinations: 
8 
Factor 
+ io° 
1.0 
0 
0.7 
- 5 
0.6 
—10 
o -5 
-15 
o -3 
— 20 
0.1 
(23) Wien-Ottakring 97. From 35 0 to 40° of declination the weight is one half that of the 
table. 
