Helen B. Sawyer A Bibliography of Individual Globular Clusters

468 Publications of the David Dunlap Observatory
1937 Wilkexs, H. Untersuchungen uber interstellare Absorption auf Grund
von Blau-, Gelb-, und Rot-Helligkeiten von 27 Kugelhaufen. Breslau
Univ. St. Mitt., v. 4, pp. 1-41.
1938 Sawyer, H. B. The light curves of two variable stars in the globular
clusters N.G.C. 6218 and N.G.C. 6254. Dunlap Pub., v. 1, no. 2,
pp. 59-68.
1939 Hachenberg, O. Der Aufbau des kugelformigen Sternhaufens Messier 92.
Z. f. Ap., v. 18, pp. 49-88.
a. Page 77, Comparison with other clusters.
b. Page 79, Comparison of variable stars.
1939 Sawyer, H. B. A catalogue of 1116 variable stars in globular star
clusters. Dunlap Pub., v. 1, no. 4.
a. Catalogue.
b. Table II. Periods greater than one day in globular clusters.
1939 OOSTERHOFF, P. Th. Some remarks on the variable stars in globular
clusters. Obs., v. 62, pp. 104-9. (Period frequency).
1040 Christie, W. H. Integrated photographic magnitudes of sixty-eight
globular cluster-. .1//. W. Cont., no. 620. Ap. J., v. 91, p. 8.
1941 DE Kort, J. Some remarks on the system of galactic globular clusters.
B. A. A'., v. 0, pp. 189-93. (Distances of 91 globular clusters).
1941 Coi'eland, L. S. List of globular clusters for common telescopes.
Telescope, v. 8, no. 1, pp. 20-1.
1942 Sawyer, H. B. The light curves of four variable stars in the Hercules
cluster Messier 13. Dunlap PuJk, v. 1, no. 11.
a. Table III. Clusters in which a period-luminosity relation is
established.
1943 Cuffi.y, J. XGC 5053 and NGC 6838. Kirkwood Pub. no. 6; Ap. J.,
v. OS, pp. 10-53.
a. Comparison of color-magnitude relations.
1943 Oosterhoff, P. Th. A semi-regular variable in N.G.C. 288. B. A. N.,
v. 9, pp. 307-0, no. 355.
a. Comparable variables in other clusters.
1943 Shapley, H. Galaxies. Blakiston, 229 pp. (Recent photographs of
many globular clusters.)
1014 Shapley, H. Galactic and extragalactic studies. XVII. Revisions of
the distances of thirty high-latitude globular clusters. Nat. Acad.
Sri. Proc, v. 30, no. 3, pp. 61-68; Harv. Repr., no. 257.
1944/ Sawyer, H. B. Lengths of cluster-type periods in Messier 22 and other
globular clusters. (Abs.) A. J., v. 51, p. 70. Summary, Federer,
Sky and Telescope, v. 3, no. 35, p. 12.
1044/7 SAWYER, H. B. Distribution of periods of cluster type variables in
globular star clusters. Dunlap Comm., no. 11; R. A. S. C. Jour.,
v. 38, p. 205.
1945 Finlay-Freundlich, E. The structure of the globular star clusters. M.N.,
v. 105, pp. 237-43.
10 1"> Sawyer, H. B. (H. Sawyer Hogg). The dimensions of the galaxy as
defined by the system of globular clusters. R. A. S. C. Jour., v. 39,
pp. 289-306.