The SciencesNovember 1, 1932
Rat "Digests" Part of a Steel Ball Bearing
Stories by F. D. Mchugh
The SciencesJuly 1, 1932
Treatment Prevents Wood Sap Stains, Fabrics Not Weakened by Cleaning Solvents and more
The SciencesMay 1, 1932
Detecting One Ten-Millionth of a Volt
The SciencesJanuary 1, 1932
New Commercial Synthetic Rubber, Iron Soft as Copper and more
The SciencesJuly 1, 1929
From Colombian Mountains to the Sea
A Rich Hinterland of Colombia, Seeking Independence of its Old Slow Transportation System, Builds a Road to the Sea
The SciencesJanuary 1, 1929
Railroads Turn to the Highways
To Protect Revenues and Give Better Service, Steam Railroads Adopt Motor Buses
TechnologyJune 1, 1928
Roller Bearings Smooth the Traveler's Road
Trains Equipped With Anti-friction Bearings Run With Minimum Jerk and Are Economical In Operation