EnvironmentNovember 1, 1927
Conservation or Extinction?
How Two Creatures, Living at the Earth's Antipodes, Were Blotted Out of Existence by Human Greed
Stories by Leon Augustus Hausman
The SciencesApril 1, 1926
The Mythological Rain-Tree
Fifteenth-Century Travelers Told Tales of a Marvelous Rain-producing Tree
HealthNovember 1, 1925
Why Hair Turns Gray
A Study of the Developing Hair Through the Microscope Reveals the Secrets of Color Production and Color Loss
HealthFebruary 1, 1925
Revolutionary New Facts About Hair
Recent Comparative Studies of Animal Hairs Under the Microscope Reveal a Remarkable Relationship Hitherto Unsuspected
HealthDecember 1, 1924
The Basis of Aquatic Life
Some Significant Phases in the Study of the Plankton of Lakes and Seas, and What They Mean to Us
EnvironmentJune 1, 1924
Birds and Sewage Disposal
An Interesting Relationship Involving the Relief of a Filtration-Plant Nuisance
The SciencesDecember 1, 1923
The "Horse-Hair Snake"
An Account of the Extraordinary Life History of One of Our Common Worms
The SciencesDecember 1, 1922
Virgin Wool and Shoddy
What the Microscope Tells Us About Their Make-Up and Identification
The SciencesOctober 1, 1922
The Microscopy of Foods
A Study of Starch, the World's Premier Alimental Substance
HealthFebruary 1, 1922
Human Hair Under the Microscope
Recent Acquisitions to the Knowledge of Its Minute Structure, and Their Applications
The SciencesNovember 1, 1921
Fabrics Under the Microscope
Some Methods in the Microscopical Examination of Textile Fibers
Mind & BrainFebruary 12, 1921
How we Think
The Microscopic Structure of the Intellectual Portion of the Human Brain
The SciencesApril 17, 1920
Tiny Creatures that Make Bad Water
The SciencesFebruary 21, 1920
Hairs that Make Fabrics
The Microscopic Identification of Mammal Hairs Used in the Textile Industry