Astronomy Sky Map 1917 Raymond Dugan, Camp Fire Stores RARE Antique

Description

“Sky Map showing the constellations as far south as the SOUTHERN CROSS; adjustable for the time of the night, date and for the LATITUDE”
“Prepared by Prof. Raymond Smith Dugan, Princeton University. Copyright 1917 by Camp Fire Stores Company”
Possibly the only one in existence – no record of another sky map like this available worldwide.
Small rips, tears, chips and wrinkles/creases throughout. Age-toning of paper. See photos.
Approximately 18″ in diameter.
Regarding Astronomer Raymond Smith Dugan, per Wikipedia:
“Raymond Smith Dugan (May 30, 1878 – August 31, 1940) was an American astronomer and discoverer of minor planets.
His undergraduate and Masters was from Amherst College in Massachusetts in 1899 and 1902. Dugan then received his Ph.D. dissertation in 1905 at the Landessternwarte Heidelberg-Königstuhl (Königstuhl Observatory, near Heidelberg) at the University of Heidelberg.
At the time, the observatory at Heidelberg was a center of asteroid discovery under Max Wolf. During Dugan’s stay there, he discovered 16 asteroids between 1902 and 1904, including notably 511 Davida.
He was employed by Princeton University as an instructor (1905–1908), assistant professor (1908–1920), and professor (1920—). He married Annette Rumford in 1909.
Dugan co-wrote an influential two-volume textbook in 1927 with Henry Norris Russell and John Quincy Stewart: Astronomy: A Revision of Young’s Manual of Astronomy (Ginn & Co., Boston, 1926–27, 1938, 1945). This became the standard astronomy textbook for about two decades. There were two volumes: the first was The Solar System and the second was Astrophysics and Stellar Astronomy.
The lunar crater Dugan and the main-belt asteroid 2772 Dugan are named in his honour.”