The Opening of the Hudson River Tunnels
The Completion of a Gigantic Task
Features
Heavy Gold Deposits and a Good them Solution for Producing Them
Solution for Producing
Wilhelm Ostwald
A Sketch of a Great Chemist's Career
Flash-Light Powder for Photographers
Plant Physiotherapeutics
The Medicinal Activities in Vegetable Matters
The Plagues of History
Their Periodic Quiescence and Recrudescence
Heusler Magnetic Alloys
Vibration in Steamships
Elements of Electrical Engineering.—XII
Conjoint Operation of Dynamos
Leather Varnishes
What Is Matter
The Investigations of Modern Physicists
Atmospheric Nitrogen
Its Fixation by Plants
