Feature

Filtrable Germs Need Not Be Extremely Small

New Steel-Making Materials Aid U. S. Defense Plans

Electrified Particles in Air May Explain “Curative Values”

Eddington Reveals Details of His Theory of the Electron

Eskimo Burial Mystery Cleared up at Point Barrow

Front Matter

First Glances at New Books

May Get Tularemia from Mosquito Bite

In Science Fields

Absolute Temperature: “A Classic of Science”

Height of Shooting Stars Measured with Wire Frame

First Welded Penstock Built in California