The Niedringhaus Memorial Building

The Transcaspian Railway—Competition: Yesterday and To-Day

On the Distribution of Internal Friction of Engines

DISTRIBUTION of FRICTION

The Forth Bridge

The Plant of the Boston Heating Company

The Great Eastern

How to make Photo Printing Plates

Curious Optical Illusion

Improved Fusible Plugs

A Simple Spectroscope

Carbon Bisulphide

Petroleum as an Explosive

Improved Wash Bottle

On the Causes of Variation in Organic Forms

United States Exhibit at the Barcelona Exposition

The Coral Industry of Leghorn

A Horned Snake

Useful Engineering Books

Building Plans and Specifications

The Labor Question in Holland