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The St. Gothard Tunnel

Beton Tunnels and Arches

The Construction of a New Foundation for Washington Monument

The Great Tunnel Under the Hudson River Between New York and New Jersey

The Great Thames Tunnel

Mines as Sources of Wealth

Smouldering Fire and Spontaneous Ignition

Multiplication Simplified

Forged Checks

Hand Made Paper

Steamboat Wheels

The Photo-Lithographic Process

By Henry Butter

Etching on Glass

Progress of the Southern Pacific

An Unpublished Chapter in the History of the Morse Telegraph

King's Electric Light

Curious Voltaic Arc Experiment

A Photo Lantern

Electricity in Wool

Eliquation of Alloys

ParkeSine, Xylonite, or Celluloid

On Tonga: A Remedy for Neuralgia, Used by the Natives of the Fiji Islands

Artificial Diamonds

Composition of Maize

Barometrical Pressure in Connection with Fermentation

Universal Method of Determining Arsenic

Determination of Chemical Affinity in Terms of Electro-Motive Force

Effects of Thirst

Cure of Diarrhea by Ice Water Injections

Plans for Reducing Obesity

Beers and Ales, Considered Medically

City Scavenging at Boston

By E. C. Clarke

On the Physical Configuration of Mars

By Wm. Harkness

Automatic Disinfecting Apparatus


Total Solar Eclipses

Cattle in Colorado


Hall of the Academy of Natural Sciences. Biological and Microscopical Section. Philadelphia, Feb. 2, 1880.

Florida Orange Culture

The Edible Flowers of the Mhowa Tree

Raising Turkeys

Forest Trees of North America

By Charles S. Sargent


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