The SciencesSeptember 1, 1933
Back of Frontispiece, September 1933
Stories by George Ellery Hale
Space & PhysicsMay 1, 1929
Solar Research for Amateurs-II
How to Construct the Spectrohelioscope, Which Reveals Solar Phenomena In Actual Motion
Space & PhysicsApril 1, 1929
Solar Research for Amateurs--I
By Means of the Newly Developed Spectrohelioscope, Vivid Phenomena on the Sun May Now Be Observed in Motion by the Amateur Scientist