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Features

The Horticultural Palace

Mining at the World's Columbian Exposition

“Non-Sticking” Armature

The Nature of Depolarizers

By Henry E. Armstrong

Horatio Allen's Ride

The Pneumatic Process of Sinking a Pier

Band-Saw Machine

A Shallow Draught Steamer

The Conversazione of the Royal Society

Duodenal Secretion and Digestion

By G. Archie Stockwell

The Cholera Epidemic

“Mixed Infection” in Cholera

Nourishment in Acute Disease

By Francis H. Williams

South Polar Whale and Seal Fishing

The Great Prize of Paris

The Sedan Chair

Insect Ravages

A Seal Rookery in the Behring Sea

The Indian Ocean

By Richard Beynon

Extinct Volcanoes in the United States

By Ralph S. Tarr

Fogs, Clouds and Lightning

Ancient Glacial Moraine and Drift at the Mouth of the Columbia River

By W. Hampton Smith

Poisonous Plants and their Poisons

By J. Guardia

Siamese Fruits

Dulcin

The Conditions Determinative of Chemical Change

By Henry E. Armstrong

The Formation of Ozone

By W. A. Shenstone and Martin Priest

Manufacture of Per-Salts of Iron

By E. Hermite and A. Dubosc

Useful Engineering Books

Patents!

The Flames of some Metals

Departments

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    July 29, 1893

    Help Us Reforest the Mississippi River Valley