Feature

Rubber Replaces Wood in Storage Batteries

Toluene May Be Made from Fractions of Petroleum

Two Physics Awards of $2,000 to Be Given

Dr. C. G. Abbot Resigns as Smithsonian Secretary

Polio Treatment

In Science Fields

First Glances at New Books

New Machines and Gadgets

Fast Vulcanizing

[Photograph]: No Waiting

Disabler Preventive

Robot Planes Not New