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Last Year's Dead Letters

The Underground and Elevated Electric Railway in Berlin—Now Completed and in Operation

By Frank C. Perkins

The Utilization of Wastes and By-Products in Manufactures

With Special Reference to the Decade of 1890-1900

By Henry G. Kittredge

Shallow-Draught Steamer

The Smokeless Combustion of Bituminous Fuel

Temperatures at Great Altitudes

Oil and Grease Separator

The World's Coal Production and Consumption

Radio-Activity and the Electron Theory

Prof. J. J. Thomson on Radio-Activity

A New Process for Treating Fine Iron Ores for Blast Furnaces

Ratios of the Atomic Weights

The Development of the German Chemical Industry

Disappearing Guns

Gymnastic Exercises of the 12th Regiment of Italian Sharpshooters

The Texas-Louisiana Oil Field

Report of Bureau of Steam Engineering on Liquid Fuel for Naval Purposes

The Voyage of the S. S. “Mariposa,” Using an Oil-Fuel Installation Exclusively under her Boilers

Plants on an Irish Bog

The Core of an Induction Coil

By William A. Del Mar

Electrically-Operated Canals in Belgian Coal-Mining Districts

Turbine Interrupter for Electric Currents

Marconi's “Carlo Alberto” Experiments

By Emile Guarini

Stars by Daylight

Cotton Growing in Cuba

The Genesis of Coal

Selected Formulæ

Trade Suggestions from United States Consuls


Trade Notes and Recipes


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    November 15, 1902

    Science for the Modern World