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Features

Improved Gun Carriage

Miscellaneous Summary

Manufacture of Ultramarine

The Expansive Working of Steam

The Chemistry of Animal Substances

Silicated Soaps

The Olier Patent for Security Paper

Expansive Working of Steam in Marine Engines

Simple Locomotive Engines

The Valve of Research

Big Guns--Why They Fail

Riots and Mob Law

Experiments with Boiling Water

Antiquity of Man

The Reaction

Some Facts Concerning Reptiles

International Competition of Steam Fire Engines

Recent American Patents

Patent Claims

To Our Readers

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August 01, 1863

Help Us Reforest the Mississippi River Valley