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Features

A Low Crib Dam across Rock River

By J. W. Woermann

The Reproduction of Diffraction Gratings

A Novel Indicator

The Chevalet Heater-Detartarizer

Genard's Safety Valve

Transferring Films While Wet

Collodion

A Terrific Ballooning Experience

Wholesale Development

Selected Formulæ

Electrical Notes

Miscellaneous Notes

Engineering Notes

The Bicycle in the Army

Renaissance Clocks according to Works of Art

Alternate Current Transformers

Lecture II. The Construction of the Transformer

By J. A. Fleming

Scientific Education in Germany and England

Some Common Diseases Observed North of the Arctic Circle

By John E. Walsh

Jointing of Sewer and Drain Pipes

By R. S. Rounthwaite

Botanical Gardens

Origin and Development

The Influence of Light upon the Periodical Depth Migrations of Pelagic Animals

By Jacques Loeb

A New Acetylene Lamp

Patents!

Departments

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    October 24, 1896

    Think Outside the Gift Box