"A system of photographic magnitudes for Southern stars."
1914 · Offprint from:
by HALM, Jacob Karl Ernst (1866-1944).
Offprint from:: Monthly Notices of the Royal Astronomical Society, Vol. LXXIV, No. 7, May 1914., 1914. 8vo. [i], (600)-622 pp. 20 tables, 1 fig. Original printed wrappers. Very good. FIRST SEPARATE EDITION. Jacob Halm was chief assistant at the Cape Observatory, Cape Town, where he performed intensive work to create good standard sequences to be used for photographic photometry in the southern sky. DSB, VI, pp. 74-75. (Inventory #: S5961)