The Human Potential in Industry
National Efficiency, Now Expressed in New Terms
Features
Free Gas Mantles in England
Fustic
An Important Dye Wood
Chemical Differentiation of the Central Nervous System in Invertebrates
Marine Engineering from 1911 to 1917
The Mystery of the Transparent Rat
Safety in Industry
First Aid and Accident Prevention in a Great Manufacturing Plant
Prof. Malladra's Recent Researches at Vesuvius
Drum-Fire
Between the Tigris and the Indus
A Region of Great Future Commercial Importance
The Efficiency of the Employe
Destruction of Field Mice
Determination of the Density of Solids
Building a Moving-Picture Camera
A Serviceable Home-Made Machine for $6.50
Practical Wartime Shell Making
Under-Sea Instinct of the Sea Lion
Change of Conductivity of Minerals by Illumination
Color and Color Photography
A Review of Problems Involved, and Methods of Working