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John Tyndall

By James Sime


By Arthur Smithells

Reclamation of the Potomac Flats, Washington, D. C.

Improvement of Potomac Flats, Washington

Cracked Plates

Velodromes or Permanent Tracks for Bicyclists

Improved Pipe-Cutting Machine

American, Egyptian, and Indian Cotton Baling

Steamer for the Manchester Ship Canal

A Bicycle Tournament

How Window Shades are Made

The Waste of Anthracite

By Henry Wurtz

Improved Smoke Annihilator

The Stereoscopic Lantern

Photography without a Camera

The “Absolute Zero” so Called

By Henry Wurtz

Animals of the Tchad

Swordfish Exploits

Swimming Drill in the German Army

The Geological Society of America

By E. O. Hovey



By W. Chandler Roberts-Austen

The Preparation and Properties of Free Hydroxylamine



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