Feature

Lysozyme and Avidin May Be Related Substances

Isoprene from Petroleum Saves Valuable Turpentine

Nature Ramblings: An Owl Howled

New Process for Heating Canned Foods Patented

First Glances at New Books

New Machines and Gadgets

Front Matter

Brain-Cutting Operation

Sky Giant of Steel Accepted by U. S. Navy

Sulfa Drug for TB

Centennial of Telegraph

Streptococci Germs May Make Diphtheria Worse