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Improve Magnetic Steam Gage

A New Application of Science

Gleason's Car Coupling

Vacancy in the Patent Office

A Compensating Clock Pendulum

Gold Solders

A Fat Fish

Novel Insect Trap

Longevity of Persons Engaged in Different Occupations

Our Reward

Method of Detecting Decay in Timber

The Bottom of the Atlantic

To Restore Writing

Recent Patented Improvements

Braden's Improved Lock

New Horse Feed

Patent Safety Air Pump Attachment

The Gibbs' Interference Case

Our Prophecy Fulfilled

The Habitual Use of Spirits

The Lives of Eminent Men

A New Gold Excitement

Effect of Too Much Acid on the System

Steam Boilers and Furnaces

The Dudley Observatory

Californian Research

A Gentle Hint

Death of M. Gardissal

The Atlantic Cable Failed

The Upas Tree

A Suggestion to Cities

Westlake's Summer Cooking Apparatus

Strength of Wire Ropes

Thayer's Carpet Fastener

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  • Letters

    Correspondents - July 31, 1858

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July 31, 1858

Beyond XX and XY

Biology. Identity. Equality.