Helen B. Sawyer A Bibliography of Individual Globular Clusters

386 Publications of the David Dunlap Observatory
Royal Canadian Institute, and the Meteorological Service of
Canada. About fifty more papers were obtained from other Canadian
libraries, those of the Dominion Observatory, Ottawa, McGill
University, and the University of Alberta. Fifty others were borrowed
from United States libraries, chiefly from the Harvard
Observatory and the University of Michigan. I am indebted to
librarians Miss Slater and Miss Wales of the University of Toronto,
Miss Hanley of the Harvard Observatory, and Mr. Gauthier of the
Dominion Observatory for aid in obtaining some of the references.
I am especially indebted to Miss Edna Fuller, Miss Ruth
Northcott and my husband, Dr. F. S. Hogg, all of the David
Dunlap Observatory, for assistance at various stages of the work;
to Mrs. R. E. Williamson for preparation of the final manuscript
for the printer; and above all to Dr. Harlow Shapley for his inspira-
tion for my two decades of work on star clusters.
I began this work with the realization that it was beyond the
limits of human frailty to make it one hundred per cent complete
and correct. I have striven to make the bibliography as correct and
complete as circumstances would permit, and will welcome any
corrections or additions of important papers which may be included
in later lists.
II. A Catalogue of Globular Star Clusters
For the convenience of the reader, certain of the material indi-
cated in the bibliography has been assimilated into a table of information
on globular clusters. Table I lists all clusters at present on
the globular list for our own galaxy. The clusters are arranged by
XGC number, which does not always correspond to right ascension
for 1950. Successive columns give the NGC number, the right
ascension and declination for 1950, and the constellation in which
the cluster is located as determined from the I.A.U. Atlas. The
galactic longitude and latitude
the basis of the Harvard Pole
have been computed for 1900 on
12 h 40 m , + 28°, with the help of
Ohlsson's tables, Lund Annals, no. 3, 1932. The concentration
class for most clusters is that assigned by Shapley and Sawyer in 1927.
The angular diameters are partly by Mowbray. 194G. and partly by
Shapley and Saver, 1935. The integrated photographic magnitude
is, when possible, by Christie, 1940; or by Sawyer and Shapley, 1927,
reduced to the same system. The spectral type and radial velocity in