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Berlin's Plant for the Burning of Garbage

Are Further Experiments needed for determining the Atomic Weight of Oxygen?

By Edward W. Morley

Hypnotism in Practice

Strength of Steel Balls

Variable Speed Gear

Gasoline Motors for Automobiles

By George Kellogg Barrett

Lord Rayleigh on Flight

A Big Shaft Lathe

Solignacts Electric Fore-Carriage

Electro-Magnetic Separator

An American Pacific Cable

By George Owen Squier

Hydraulic Cements

By William S. Macharg

The Metric System

Ice upon the Coast of the Black Sea

Schweitzer System of Bread making in Paris

The Electrical Potential of the Atmosphere, Referred to other Conditions

By Edwin G. Dexter

Power from Trenton Falls

By L. P. gratacap

Selected Formulæ

Trade Notes and Receipts

Trade Suggestions from United States Consuls

The Man's Knife among the North American Indians—A Study in the Collections of the United States National Museums

By Otis Tvfton Mason Curator

Cruise of the “Albatross”



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