Systems of Payment in Factories
A Study of Their Needs
Features
What is “Hardness?”
Concrete Vessels
The Brazil Nut of Commerce
How it Grows: And how it is Gathered
Protecting Metals
Enzymes—Substances which Transform Food into Body Constituents
Palæontology
Its Aims and Methods
Hevea Rubber Tree
The Oaks of America
Making Bronze Statuary
An Ancient Art that is Still Prominent for Decorative Purposes
Trees in Medicine
Agencies for the Alleviation of Disease Provided
How to Silver Mirrors for a Reflecting Telescope
Cyclonic Disturbances and their Effect
An Explanation of the Air Currents Involved
The Dynamographic Platform
A Device for Teaching War Cripples to Walk
Detection of Tallow and Hydrogenated Fats in Butter Fat
The Preparation of the Knife for Section Cutting
Refractory Materials—I
Their Characteristics, Applications and Methods of Examination
