Volume 81, Issue 2111supp
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Features
Chemical Gardens
Some Pleasing Experiments That Are Easily Performed
Cement Trade in Ecuador
Synchronous Gearing
Mechanisms of Essential Importance in the Printing Telegraph
The Mechanism of a Dream
Operations of the Mind When Volition Is In a State of Suspense
Baking Paint on Steel Cars
Medicines used by the Ancient Romans
Power from Tidal Currents in the Bay of Fundy
The Proposed German Nitrogen Monopoly
Winter in the Trenches
Disheartening Conditions for the Fighting Men in France
Phosphorescent Calcium Sulphide
Electric Truck Troubles
Early Experiences of Manufacturers, and How They Have Been Overcome
The Sidereal Center
Zinc Wire
Artificial Seasoning of Timber
Methods and Principles Adopted for Various Materials