The Utilization of Wastes and By-Products in Manufactures

With Special Reference to the Decade of 1890-1900

New El Paso, Texas, Oil-Burning Blast Furnace Plant

What is Steel?

Pressure Indicator

A New Method of Starting Induction Motors

The Cyathometer

Double Safety Valves

Electric Power on the Comstock

Contemporary Electrical Science

Methods of Fishing in Hawaii

The Respiration-Calorimeter and its Use

Recent Progress in Astronomy

The Dead Sea as it is To-Day

An Excursion to the House of Minos

The Biography of a Snowflake

The New Weather Vane of the Eiffel Tower

A Long-Nosed Monkey

The Atomic Theory without Hypothesis

World's Coal Supply

Trade Suggestions from United States Consuls

Selected Formulæ

Patents!