Adding Color to the Motion-Picture Screen, Progress in Electrification of Swiss Railways and more

The Overhead Cable Crossing

Largest Electric Transmission Span in the World, at Three Rivers, Quebec

Determining the Heating and Cooling Curves of Metals

The Dendrograph--An Instrument that Keeps Tabs on Tree Growth, A Fire-Fighting Equipment on Rails

The Architecture of the Molecule

Some of the Things Which the Langmuir Postulates Tell Us About the Chemical Compounds

Ancient Remains in Colorado

The Mesa Verde National Park, Landmark of a Lost Race

A Racing Car with Two Engines

An Old Departure in Theater Building

Solving the Short-Haul Problem

The Role of the Light, Narrow-Gage Railway in the Local Transportation of the Future