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Some German Electrically-Operated Cranes

By Alfred Gradenwitz

The Rise of Electrostatics

How a Great Telephone System is Designed

By J. J. Carty

Reservoir, Fountain, and Stylographic Pens.—III

Stylographic Pens and Manufacture of Gold Pens

By James P. Maginnis

Molding Sand

By H. E. Field

Lightning and the Electricity of the Air.—II

Some Measurements of the Potential of the Air

By Alexander G. McAdie

Celluloid and Galalith

The Possibilities of Concrete Construction from the Standpoint of Utility and Art

By William L. Price

Surveying on the Farm


By A. S. Kenyon

How to make a Gliding Machine

By Livingston Wright and Gordon Johnson

Valuable alloys.—III

White Metal

Science Notes

Electrical Notes

Engineering Notes


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