ASTRONOMY AND MAN, 1929, The Astrophysical Observatory, Potsdam, Germany, blue card folio, 240mm x 220mm, original typed manuscript dissertation pp.57, with handwritten diagrams and annotations in ink by Erwin Roschau (?), illustrated with a selection of unique silver gelatin prints (11) the majority of which approx 170mm x 125mm, photographs include; Large refractor from the astrophysical observatory in Potsdam, Dumbbell Nebula, Image of the Moon from the Astrophysical Observatory, Star cluster in Hercules, Andromeda Nebula. Enlargement of an original photograph taken with the small reflector of the astrophysical observatory in Potsdam, Spiral Galaxy in the “Jagdkunden”, The Orion Nebula, Sun Corona - Original photograph of a solar eclipse taken at Lick Observatory, Sun corona with protuberances, Roodame comet, Nebula in Triangulum, and reproductions; Surface patterns of Mars after studies from the Lick observatory, Section of a Sun spectrum, (2), each image with tissue guard and handwritten titles in ink, a fine collection of early 20th century astronomical photography