The Extraction of Low-Grade Copper Ores

Use of Gas for Power and Heating.—II

Why Castings Curve

Simple Steam Turbine Engines.—L

The Work at Panama

The Domestic Life of Animals

The Sacred Lotus Tree

Theories of Ore Deposition Historically Considered

Porcelain

Thermometers, Pyrometers, and Thermo-Regulators Operated by the Pressure of Saturated Vapors

Thermometers and Pyrometers

To Darken Aluminium Sheets

Evolution and Inanimate Matter

A Soap Solution for Determining the Hardness of Water

Trade Notes and Formulæ

Science Notes

Electrical Notes

Engineering Notes