Volume 9, Issue 218supp
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Features
The Garrett Submarine Torpedo Boat
A Dry Canal for Ships
The Tees Breakwater
The Great Bridge Over the Frith of Forth in Scotland
ST. Mary's Church, Brighton
Pneumatic Foundations
Turner's Gas Engine
The Old Northwest
Electro-Dynamic Transmission
Spectrum of the Electric Spark Between Magnesium Points
The Temperature of the Carbon Points in the Electric Lamp
A Cheap and Simple Camera for the Microscope
The Highest Magnifying Power Ever Reached
A New Electric Burner
On the Number of Vibrations Necessary for the Recognition of Pitch
Photographs of Microscopic Objects
The Touroscope
Mars
The Earth Five Hundred Million Years Old
The Diamond—its Origin, Artificial Production, and Uses
On a New Violet Coloring Matter
Ammonia From Atmospheric Air
Cleaning Cashmeres and Silks, and Dyeing with Resists
The Influence of Shock on Memory
The New an æsthetic—The Bromide of Ethyl
Falsification of Copperas
Manna Production in Italy
Two Valuable Insecticides
New Use for Hemp
American Apples in Europe
Milk Beer
The Chinch Bug
Amount of Injury it Causes