Volume 48, Issue 1237supp
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Features
Account of Dr. Peters' Recent Visit to the Ruins in Zambesia
Forest and Mineral Wealth of the Soudan
Precious Stones of New York
An Improved Continuous-Combustion Generator
The Designing of Automatic Machinery
The “Ideal” Saw-Guard
Trade Suggestions from United States Consuls
Selected Formulæ
Trade Notes and Receipts
Miscellaneous Notes
The Victoria Regia
Natural and Artifiulal Rubber
Archæological Discoveries at Carthage—I
A Century of Spade Work
Our Trade with Germany
The Chemistry of Cold Storage
Transportation Routes of the Western Hemisphere
Trade with the British West India Islands
Action of Light on Birds' Feathers
The Manufacture of Carbons
A Source of Intense Monochromatic Light
The Waste of Shipping
The Cost of a Train Mile
The Relations of Physics and Astronomy to the Development of the Mechanic Arts
United States Weather Bureau, Washington, D. C. viii. education in science and training in art are mutually helpful