The Hat Conformator and its Diagrams

The Genesis of the Telephone

Invention as a Means of Culture

The Treatment of the Insane

Fish Teeth Set on Hinges

A Brief History of Our Patent System

Hayford's Wood-Preserving Process

The Astounding Famine in China

Improved Fire Escape

The Liquefaction of the Gases--M. Pictet's Apparatus

Communications - March 9, 1878

Practical Mechanism

NEW SERIES.

Talley's Hydraulic Engine

The Ransom Siphon Condenser

The Cereus Candicans

Black Cock and Ptarmigan

The “Acme” Double Acting Steam Pump

Submarine Illumination

Astronomical Notes