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A Design for an Electric Launch Motor

By Charles T. Child

A New Gasoline Motor

Electrical and Engineering Work in the Navy during the War

By W. D. Weaver

The Longsdon Gas Engine

The Central London Railway

Damage to Italian Shipping by Galvanic Action

The Tactical Applicability of the Maxim Machine-Gun

By A. V. Boguslawski

Engineering Notes

Selected Formulæ

Miscellaneous Notes

The Saint Gobain Plate Glass Manufactory

Improvements in Bronze Casting

Acetylene for Gas Engines

The Ives Chromoscope

Waste Heat at Sea


The First Elevator

The Micronesian Venice

Behavior of Air Under Great Electrical Stress

Bignonia Purpurea

Peanuts and Peanut Oil

The “Secret of the Harem”

A Short History of Scientific Instruction

Aneroid Barometers

By C. F. Marvin

Some Thoughts the Changes on Retarding of Old Age

By Albert Seitz

Ozone and the Phenomena of Phosphorescence

Ancient Trepanning

The Power of Wood Saws



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