Space & PhysicsJune 1, 1940
Marvels of the Night
Striking Natural Phenomena, The Aurora, Zodiacal Light, and Bizarre Types of Lunar Halos
Stories by William Crowder
EvolutionSeptember 1, 1922
Down Through the Ages
Intimate Glimpses of Animals Which Have Survived from Prehistoric Times
EvolutionJune 1, 1922
Why Did the Hermit-Crab Become a Hermit?
A Chapter from the Story of the Struggle for Existence That Accounts for This Curious Creature
The SciencesDecember 1, 1921
How Marine Worms Catch Their Prey
A Study of These Interesting Forms of Sea Life, Which Abound in Great Numbers and Wide Variety
The SciencesNovember 1, 1921
The Truth About the Devil-Fish
Correcting Various Erroneous Views Which Have Been Spread by the Highly Interesting if Inaccurate Fictionists
The SciencesJuly 23, 1921
What Makes the Glow-Worm Glow?
What Recent Investigations Reveal in the Matter of the Luminous Organs of Various Insects and Sea Life
The SciencesJune 25, 1921
How the Lower Animals See
Old and New Ideas on the Function and Operating Details of Insect Eyes