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Features

Economy in Study—II

Educative Imagination

By George Van N. Dearborn

Business in Engineering

Field Cables

Keeping Up Communication Between Divisions of an Army

Pneumatic Massage

Electric Cooking Ranges in Hospitals

Leaf Photography

Lutes and Cements

Materials of Value to the Chemist, Physicist and Experimenter

By S. S. Sadtler

The Part of the U. S. Coast and Geodetic Survey in the Development of Commerce

Some American Glaciers

Alaska and the Northwest Coast Furnish Varied Specimens

By Carlyle Ellis

The Cost of Mountain Railways

The Dangers of Rubber Manufacture

Farm Tractors

A Review of Their History, Conditions of Use and Methods of Construction

By Philip S. Rose

Annealing Furnaces

Latest Gas and Electric Types

Nickel Plating Aluminium

Mica

Its History, Production and Utilization

The Blind Spot

A Peculiarity of the Eye that is a Source of Danger

By Edna B. Dayton

Alloy of Nickel and Tantalum

Coal Fields of the United States

Germany Produces an Oil Substitute

Notes on the Eucalyptus Oil Industry of California

By P. W. Tompkins

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    April 29, 1916

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