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Features

Details of the Grand Prix Racing Cars

By the Paris Correspondent of Scientific American

Sand for Mortar and Concrete

By Sanford E. Thompson

The Time of Discharge in a Crookes Tube

High-Speed Motor Boats

By James A. Smith

Contemporary Electrical Science

Measurement of Resistance

Summer Lepidoptera

By H. Dollman

Insecticides: Their Preparation and Use

Utilization of Gas from Suction Producers

By Oskar Nagel

A Methodical Experimental Study of the Aeroplane

By Victor Tatin

A New theory of Erect Vision

By Abb*amp*eacute; Noguier De Malijay

Some Astronomical Consequences of the Pressure of Light

Electrical Notes

Engineering Notes

Science Notes

Trade Notes and Formulæ

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    July 28, 1906

    Think Outside the Gift Box