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The Covering Power of White Lead

Lubricants for Glass Stop-Cocks

By Francis C. Phillips

Compound Blowing Engines

University of Pennsylvania Lecture Course

Peculiar Laws and Customs in the American Colonies

Wireless Telegraphy

Scott's Circular saw Guard

Railways in Cuba

Automatic Registering Apparatus

Selected Formulæ

Engineering Notes

Electrical Notes

Trade Suggestions from United States Consuls

The Alkali Soils of the Yellowstone Valley

Electric Traction and its Application to Suburban and Metropolitan Railways

By Philip Dawson

Comet-Photography

The Asiatic Poppy, the Deadly Flower of the Yellow Races

The Intelligence of Tropical Ants

By Eugene Murray-Aaron

Some Data on Rattlesnakes

Malarial Disease in Tropical Countries

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    May 13, 1899

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