
The SciencesSeptember 1, 1933
Back of Frontispiece, September 1933

Back of Frontispiece, September 1933

Solar Research for Amateurs-II
How to Construct the Spectrohelioscope, Which Reveals Solar Phenomena In Actual Motion

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