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Illumination from Large Area Light Sources—II

Some Experiments Carried Out With Actual Home Conditions

By Herbert E. Ives

Fuel for Aircraft, The Source of Radium

By Pegasus

The Source of Radium

Shackleton's Transantarctic Expedition of 1914

The Study of Seas and Coastline of the Antarctic Continent Most Urgent

By William S Bruce

The Protection of Iron and Steel by Paint Films

The Problem of Preservation to be Solved is Physical Rather Than Chemical

By Norman A. Dubois

Labor Classified on a Skill-Wages Basis

A Plan for the Equitable Adjustment of Wages Inaugurated by the Ford Motor Company

By O. J. Abell

The Car Ferry in Freight and Passenger Service

Its Evolution From a Mere Float to a Veritable Liner

By Harry Chapin Plummer

Progress of the Safety Movement

A Review of Work Done to Prevent Accidents and to Promote Health in the Industries

By Mancius S. Hutton

Sikorsky's Stupendous Biplane

The Crooked River Arch

Engineering Skill Solves a Difficult Bridge Building Problem Despite the Use of Falsework

By C. E. Chase

Deteriorating Marksmanship in the German Army

By Oskar Kallos

Applications of Electromagnetic Tripping Devices

Mechanisms Which Prevent the Damaging of Machines or the Production of Defective Work

By George M. Meyncke

The Measurement of Vessels for the Panama Canal

Stellar Photography for Amateurs

By W. H. Steavenson

Sunlight and Organic Synthesis


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