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Features

Largest Turret Ship in the World

Cant Hook Handles

Musical Instruments: Their Construction and Capabilities

By A. J. Hipkins

The Old Rag Industry

Street Cleaning in Paris

Photography on a Black Ground

Camphor Industry in Florida

The New Gas, Chlorofluoride of Phosphorus

A Monster Machine-Cut Spur Gear

Jugglery

The Last of the Great Eastern

Astronomical Observatories and what is Done There

By F. W. Levander

Restoration of Stegosaurus

By O. C. Marsh

Educated Storks

Oriental Explorations

Bold-Leaved Hardy Plants

Present Standing of the Several Hypotheses of the Cause of the Glacial Period

By T. C. Chamberlain

On the Solid and Liquid Particles in Clouds

Experiments in Hypnotism at the Salpetriere

Patents!

Building Plans and Specifications

Useful Engineering Books

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    September 05, 1891

    Beyond XX and XY

    Biology. Identity. Equality.