A Field Book of the Stars/Map of the Heavens-07-01

A Field Book of the Stars (1911)
by William Tyler Olcott
Map of the Heavens 9 P.M., July First
3445547A Field Book of the Stars — Map of the Heavens 9 P.M., July FirstWilliam Tyler Olcott

THE CONSTELLATIONS OF SUMMER.

Map showing the principal stars visible from Lat. 40° N. at 9 o'clock, July first.