Helen B. Sawyer A Bibliography of Individual Globular Clusters

404 Publications of the David Dunlap Observatory
NGC 5139 (Cont.)
1916 Bailey, S. I. Cluster variables with double maxima. Harv. Circ, no. 193.
1917 Shapley, H. Studies. VI. The relation of blue stars and variables to
galactic planes. Mt. 11*. Comm., no. 45; Nat. Acad. Sci. Proc,x. 3, pp. 276-9.
1917 Shapley, H. Studies. VII. A method for the determination of the relative
distances of globular clusters. Mt. 11'. Comm., no. 47; Nat. Acad. Sci. Proc,
v. 3, pp. 479-84.
1917 Eddington, A. S. Researches on globular clusters. Obs., v. 40, pp. 394-401.
1919 Innes, R. T. A. Centennial proper motions of stars near co Centaurus.
Union Circ, no. 45, p. 1.
1919 Plummer, H. C. An analysis of the magnitude curves of the variable -tar-
in four clusters. M. N., v. 79, pp. 639-57.
1921 Shapley, H. The scale of the universe. Pt. 1. Nat. Res. Conn. Bull.,
v. 2, p.' 171.
1923 Innes, R. Proper motions found and measured with the blink microscope.
Union Circ, no. 59; p. 208, Region around co Centaurus; p. 215, Variable
stars in and near the cluster co Centaurus.
1924 Sola, J. C. Obscrvacion estereosc6pica del cumulo estelar co del Centauro.
Fabra Bol., v. 1, pp. 240-2.
1925 Stromgren, E. Om bevaegelses mulighederne i stjernehobe. Nord. A.
Tids., v. 6, pp. 21-8.
1928 Schilt, J. The distribution of light in the central part of the globular cluster
co Centauri. A. J., v. 38, pp. 109-15; (Abs.) Pop. Astr., v. 30, p. 296.
1931 Mineur, H. Mises au point d'astronomie stellaire. Ill Cepheides et amas.
Soc. Astr. France, Bull., no. 45. p. L94.
1932 Grossc, E. Untersuchungen iiber die veranderlichen Sterne im Kugel-
sternhaufen Messier 53. A. N.. v. 246, pp. 401-5; Hamh.-Berg. Abh.,
no. 4, p. 2.
1H32 Sawyer, H. B. Periods and light curves of thirty-two variable stars in the
globular clusters N.G.C. 362, 6121, and 6397. Sec4. Additional observations
on the long period Cepheids in Omega Centauri. Harv. Circ, no. 366.
(Abs.) The periods of thirty-six variable stars in tour globular clusters.
Am. A. S.Pub.,x. 7, p. 35, 1931.
1933 Hertzsprung, E. Discussion of observations made by H. van Gent of the
variable star Bailey 65 in co Centauri. of which the period i- the shortest
known. B.A.N. , v. 7, pp. 83-4.
1937 Martin, \V. Chr. Photographische photometric van veranderlijke sterren
in co Centauri. Leiden. Drukkerij "Luctor et Emergo." 80 pp.
1938 Cluster-type variable in co Centauri. Obs., v. 61, pp. 168-9.
1938 Martin. W. Chr. Photographic photometry of variable stars in the globular
cluster co Centauri. Leiden Ann., v. 17, pt. 2. (Plates).
1938 Martin, W. Chr. The brightest variable star in co Centauri. B. A. X.,
v. 8, pp. 290-2.
1939 Christie, W. H. The distribution of the integrated absolute magnitude- oi
the globular clusters. (Abs.) A. S. P. Pub., v. 51, p. 217.
1940 Martin, W. Chr. New observations of the variable co Centauri No. 1.
B. A. N.. v. 0, p. 60.