APPENDIX III 
281 
Z. D. FACTORS. 
Right-Ascension 
Declination 
Right-Ascension 
Declination 
Z. D. 
Factor 
Z. D. 
Factor 
Z. D. 
Factor 
Z. D. 
Factor 
72 ° 
0.9 
65 ° 
0.9 
78° 
0.6 
73 ° 
0.6 
73 
0.9 
66 
0.9 
79 
°-5 
74 
°-5 
74 
0.8 
67 
0.8 
80 
0.4 
75 
o -5 
75 
0.8 
68 
0.8 
81 
0.25 
76 
0.4 
76 
0.7 
69 
0.8 
82 
0.1 
77 
0.4 
77 
0.7 
70 
0.7 
78 
o -3 
7 i 
0.7 
79 
0.2 
72 
0.6 
80 
0.1 
These weights can only be regarded as rough estimates. For many of the catalogues they are 
probably too large. For a few catalogues, indicated in the notes, special factors were employed. 
The body of the tables contains under the designation of each catalogue the number of observa¬ 
tions that corresponds to the weight found on the same line at the extreme left. 
It is scarcely necessary to say that these weights are relative only. They are based upon the 
assumption that the system of this Catalogue, in comparison with an individual catalogue of 
observation, is nearly absolute. 
Finally, come the Remarks, or Notes, which have been limited to the cases most in need of 
explanation. These are referred to in the tables by numerals inclosed in parentheses. 
