Space & PhysicsDecember 1, 1940
Telescoptics, December 1940
A Monthly Department for the Amateur Telescope Maker
Stories by Albert G. Ingalls
Space & PhysicsNovember 1, 1940
Telescoptics, November 1940
A Monthly Department for the Amateur Telescope Maker
Space & PhysicsOctober 1, 1940
Telescoptics, October 1940
A Monthly Department for the Amateur Telescope Maker
The SciencesSeptember 1, 1940
Telescoptics, September 1940
A Monthly Department for the Amateur Telescope Maker
HealthAugust 1, 1940
Is your Pet Dentifrice Safe?
Most Dentifrices Are Good but Many of the Claims Made Are Not Justified
TechnologyAugust 1, 1940
Telescoptics, August 1940
A Monthly Department for the Amateur Telescope Maker
Space & PhysicsJuly 1, 1940
Telescoptics, July 1940
A Monthly Department for the Amateur Telescope Maker
Space & PhysicsJune 1, 1940
Telescoptics, June 1940
A Monthly Department for the Amateur Telescope Maker
Space & PhysicsMay 1, 1940
Telescoptics, May 1940
A Monthly Department for the Amateur Telescope Maker
Space & PhysicsApril 1, 1940
Telescoptics, April 1940
A Monthly Department for the Amateur Telescope Maker
Space & PhysicsMarch 1, 1940
Telescoptics, March 1940
A Monthly Department for the Amateur Telescope Maker
Space & PhysicsFebruary 1, 1940
Telescoptics, February 1940
A Monthly Department for the Amateur Telescope Maker
Space & PhysicsJanuary 1, 1940
Telescoptics, January 1940
A Monthly Department for the Amateur Telescope Maker
The SciencesJanuary 1, 1940
The Carboniferous Mystery
Prints Roughly Resembling Human Footprints, and Found in Very Ancient Rocks, Would Greatly Add to Mans Antiquity
Space & PhysicsDecember 1, 1939
Telescoptics, December 1939
A Monthly Department for the Amateur Telescope Maker
Space & PhysicsNovember 1, 1939
Telescoptics
A Monthly Department for the Amateur Telescope Maker
Space & PhysicsOctober 1, 1939
Telescoptics, October 1939
A Monthly Department for the Amateur Telescope Maker
Space & PhysicsAugust 1, 1939
Telescoptics, August 1939
A Monthly Department for the Amateur Telescope Maker
Space & PhysicsJuly 1, 1939
Telescoptics, July 1939
A Monthly Department for the Amateur Telescope Maker
The SciencesJune 1, 1939
Telescoptics, June 1939
A Monthly Department for the Amateur Telescope Maker
Space & PhysicsMay 1, 1939
Telescoptics, May 1939
A Monthly Department for the Amateur Telescope Maker
Space & PhysicsApril 1, 1939
Telescoptics, April 1939
A Monthly Department for the Amateur Telescope Maker
The SciencesMarch 1, 1939
Fire-Walking
When Investigated by Scientists, the Oriental and South Sea Island Feat of Walking Barefoot on Fire or Red-hot Stones Gives up its Mysterious Secrets
Space & PhysicsMarch 1, 1939
Telescoptics, March 1939
A Monthly Department for the Amateur Telescope Maker