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Glue Testing

By S. Rideal

The New Statue of Franklin in Philadelphia

Pictures Produced on Photographic Plates in the Dark

Lathe Milling Attachment

Large Condensing Plant

Trade Suggestions from United States Consuls

Engineering Notes

Selected Formulæ

Electrical Notes

Magnetism Illustrated by Air Currents

Operating Costs of Horse and Electric Delivery Wagons in New York City

By G. F. Sever and R. A. Fliess

An Automobile Journey in Tyrol

The Restio Family

Mapping the Mammoth Cave

By Horace C. Hovey

Progress in the Iron and Steel Industries

Gigantic Insects

The Chemistry of Sausages

History of Weather Telegraphy


The Salt in Salt Lake


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    The Essential Guide to the Modern World

    The Essential Guide to the Modern World