54 ©. V. D. OHARDIER, 
23. General catalogue. Taking into consideration all B-stars of 
the subelasses Zo, Z1, 42, #3 and 4s (and the 10 stars of type Oe 
5 B) eontained in the Annals of the Harvard Observatory 50 and 56 
we get, in all, 805 stars which are classified in the following catalo- 
gue (Table 16). 
The stars are arranged according to the different squares and, 
within each square, according to increasing «a. 
The 1* column gives the name of the square. 
The 2° column gives the current number. 
The 3° column gives the number in Boss’ Preliminary Catalo- 
gue for those stars which are contained in that catalogue. 
The 4" column gives the constellation, generally taken from 
AMBRONNS »Sternverzeichniss enthaltend alle Sterne bis zur 6.5"" Grösse», 
The 5 column gives the name of the brighter stars according 
to BAYER's nomenclature. 
The 6" column gives the type and subclass of the spectre of 
the stars taken from H. A. 50 and H. A. 567, 
The 7" column gives the magnitudes of the stars according to 
H. A. 50 and H. A. 56. For some of the fainter stars the magnitudes 
(in H. A. 56) are taken from the Bonner Durchmusterung. 
The 8" and the 9" column give the right ascension and the 
declination of the stars for the equinoctium 19000. Both coordinates 
are taken from B. P. C., if the star is contained in that catalogue. For 
the other stars I have used the coordinates of H. A. 50 or H. A. 56. 
The 10, 11" and 12" column give the reduced spherical coor- 
dinates of the stars referred to the galactic system of coordinates, de- 
fined in § 18. It is to be remarked that these coordinates are inde- 
pendent of the absolute magnitudes as well as of the dimensions of the 
stars and depend only on their sphærical eoordinates and their appa- 
rent magnitudes. 
The right side of the catalogue gives for each star in the 19^ 
column the square and in the 14" column the current number. 
! Exceptionally the stars 106 and 209 have, according to CAMPBELL, been treated as 
belonging to the subclass Bo, instead of Bs and B5 respectively according to H. À. 50. 
This divergence is, however, immaterial, as the values of À are nearly identical for this 
three subclasses. 
