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Design for the Tower Bridge

Machine Guns at the Inventions Exhibition

The Steamer Pittsburg

Ocean Lightships with Captive Balloons

Compressed Air Locomotives

The Oerlikon Roller Grinding and Grooving Machine

New Secondary Battery

New Thermodynamics

Warmth, Coldness, and Pressure

The Marble Panels of the forum Romanum

Fire-Proof Building in New York

Frescoes Found in Rome

The Bower-Barff “Rustless Iron”

By J. H. Kidder

The Method of Making Soap—Laundry and Toilet—With Formulas

By an Experienced Manufacturer

Anderson's Water-Purifying Apparatus-Inventions Exhibition


On the Organization of the Tribe

By J. W. Powell

The Ways of Monkeys

By Alfred E. Brehm

A Colossal Cotton Tree

Camphor Barometer, or “Storm Glass”

Regulation of Sex Proportion in Animals and Plants

Causes of Sex

The Glycerine Barometer


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