"Juan Hartmann, 1865-1936." Offprint from: Revista Astronomica, Tomo VIII, NÚM. VI.

Paraguay:: Corletta & Castro, 1936., 1936. (255 x 170 mm). 343-362 pp. Frontis. port. of Hartmann. Printed wrappers. Very good. Hartmann [Johannes Franz Hartmann], German physicist and astronomer, earned his doctorate from the University of Leipzig with a paper on lunar eclipses (1891). He became the director of the La Plata Astronomical Observatory, Argentina (1922-1934). This work, by Juan Jose Nissen, includes a bibliographical index, "Indice Cronologico de las Publicaciones Efectuadas por el Dr. Juan Hartmann," prepared by M. Dartayet.