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Features

Gas-Engine Ignition

The Excavation for the Pennsylvania Railroad Station, New York

The First Railway in America

By E. W. Hilgert

With the Baltic fleet at Tsushima

By R. D. White

Chimney Draft

By W. W. F. Pullen

A New Type of Hydraulic Press for indenting and Heading Cartridge Cases for Quick-Firing Guns

Growth of Foreign Commerce of the United States during decade 1896--1906

Tubes in Cement

A New Respiratory Helmet

M. Leduc's Experiments

The Paris Correspondent of Scientific American.

The San Francisco Lesson

By F. W. Fitzpatrick

New Results in Heredity and Evolution

By G. Gordon Copp

The Intellectual Value of Tool Work

Marsh Reclamation as a Preventive of Mosquito Generation—Commercial uses of Reclaimed Marshes

The Pressure of Explosions—Experiments on Solid and Gaseous Explosives

By J. E. Petavel

Efficiency of Illuminants

The Tall Mountains of the World

By Day Allen Willey

Contemporary Electrical Science

Electrical Notes

Engineering Notes

Science Notes

Trade Notes and Formulæ

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