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Features

The British First-Class Battleship Prince George

Traffic on Asphalt

The Tunnel under the Spree, near Treptow

The Water Power of the Drainage and Ship Canal, and its Transmission to Chicago

By H. S. Putnam

Home-Made Graduated Measures

Printing out Weak Spots in Negatives

By N. Monroe Hopkins

Selected Formulæ

Engineering Notes

Electrical Notes

Miscellaneous Notes

A Petroleum Irrigation Pump

Thirty Ton Steam Locomotive Crane

The De Dion & Bouton Gasoline Tricycle

The Toxic Effects of Tobacco

By W. Crock

The Presence and Significance of Bacteria in Air, Water and Food, and their Relation to Health

Nashville, Tenn., Professor of General, Descriptive and Surgical Anatomy and Microscopy in the Medical Department of the University of Tennessee

By William D. Sumpter

Copper from Green Water

Cryptoscope Screens

A New Fluorescent Substance

By Leon Bertrand

Vanadium and some of its Uses

By John M. Tobin

Fiske's Helm Indicator and Steering Telegraph

Electric, Lighting of Avenue De L'opera, Paris

Scenery of the Moon

By Robert Ball Lowndes

The Temperature of Incandescent Lamp Filaments

Meteorology in Schools

Sweden's Great Exhibition

The Orchid Disa Pulchra, Sonder

A Novel Experiment on Vegetation

Pasteur's Tomb

A Strange Island

Patents!

Gulf of St. Lawrence Tides

Prediction of Earthquakes by Animals

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    Why Do Facts Fail?

    Why Do Facts Fail?

    Deconstructing Denial