Volume 115, Issue 21
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Features
Strange Modes of Food Preservation
One Half the World Never Knows what the Other Half Eats
Artificial Rock Salt from Hydraulic Presses
Reading the Secrets of the Earth
Subterranean Pressures Recorded by a New Type of Electric Cell
Strategic Moves of the War, November 9th, 1916
By Our Military Expert
When Fulton Suggested Submarine Warfare
Is the History of More than a Century Ago Being Repeated in Part Today?