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The Cylindroid

By John W. Griffiths

A Dry Canal for Ships

The Garrett Submarine Torpedo Boat

The Great Bridge Over the Frith of Forth in Scotland

The Tees Breakwater

Pneumatic Foundations

By A. Heinercheidt

Turner's Gas Engine

ST. Mary's Church, Brighton

Electro-Dynamic Transmission

The Old Northwest

A Cheap and Simple Camera for the Microscope

The Temperature of the Carbon Points in the Electric Lamp

The Highest Magnifying Power Ever Reached

Spectrum of the Electric Spark Between Magnesium Points

On the Number of Vibrations Necessary for the Recognition of Pitch

By A. E. Dolbear

A New Electric Burner

By M. Perruche

Photographs of Microscopic Objects

The Touroscope


The Diamond—its Origin, Artificial Production, and Uses

By Henry A. Mott

The Earth Five Hundred Million Years Old

Ammonia From Atmospheric Air

On a New Violet Coloring Matter

By M. Prud*amp*apos;homme

Cleaning Cashmeres and Silks, and Dyeing with Resists

The New an æsthetic—The Bromide of Ethyl

By R. J. Levis

The Influence of Shock on Memory

By R. O. Cowling

Falsification of Copperas

American Apples in Europe

By E. R. Billings

Two Valuable Insecticides

New Use for Hemp

Manna Production in Italy

Milk Beer

The Chinch Bug

Amount of Injury it Causes

Ravages of Phylloxera

Early Suggestions Concerning the Casting and Production of Heavy Ordnance

Railroad Shakes

By S. W. Robinson


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    March 06, 1880

    20% Sitewide for President's Day