The Præsepe group
Subtitle: measurement and reduction of the Rutherfurd photographs ...
Series: Contributions from the Observatory of Columbia University, New York.; no. 15
Published: 1898
Place of publication: New York
Language: eng
Number of pages: 286
Subjects: Stars -- Clusters.
Notes: Thesis (PH. D.)--Columbia University.
Biography.
Reprinted from the Annals of the New York Academy of Sciences, vol. X.