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California Hydraulic Mining under the Caminetti Act

Farming by Machinery

The Thickness of Macadam Material

Running a Blast Furnace

A Remarkable Railway Crossing

Gelatin as Applied to the Manufacture of Artificial Silk

By Charles E. Miller

Machines for Raising Water

Jute Statistics

Trade Suggestions from United States Consuls

Electrical Ignition for Gas and Gasoline Engines

By P. P. Nungesser

Trade Notes and Receipts

Selected Formulæ

The Foreign Power Section of the Paris Exposition

The means of Defense of Animals.—V

The Bamboo Bear of Tibet

Russian Central Asia: Countries and Peoples

Countries And Peoples

By Archibald R. Colquhoun

Archæology of Lytton, British Columbia

By Harlan I. Smith


Polar Lights


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July 21, 1900

Of Shamrocks and Science

Happy St. Patrick’s Day