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Human Longevity

A Submerged Mexican Village

To Silver Silk Ribbons

Terms of Credit in Different Countries

Antiquity of Biscuits

The Apollo Belvedere

Italian Marbles

H. M. S. Sanspareil

A Water Locomotive

The “Slip” of Screw Propellers

Apparatus for Studying the Expansion of Metals

The Great Mulhouse Universal Lathe

Apparatus for Filling a Burette

Some Pieces of Chemical Apparatus

Nickel Salts used in Dyeing

Indian Corn Oil

Black Dyes

Drum Armature for the Hand Power Dynamo

By Geo. M. Hopkins

Warner's Improved Dry Plate Holder

Building Plans and Specifications

Thawing Frozen Earth


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June 25, 1887

20% Sitewide for President's Day