Testing Physical Fitness with the Camera
The Mensurgraph a New Aid to Photographic Measuring
The Mensurgraph a New Aid to Photographic Measuring
Suggestion of Permanent Peace-Time Value Drawn from the Efforts to Make Ships Invisible
A Vast Engineering Project That Will Take Thirty-three Years For Its Completion
Floating a Wrecked Vessel on Her Side
Announcement on the rise in subscription cost of the Scientific American to $4.00
Railways and the defense of the U.S.
The use of the bank check in Europe
The Dreadnought of the Civil War
Hardships Undergone and Results Achieved in Surveying for the Federal Government
Supplementing the X-Ray in Hunting for Bullets in the Human Body
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A New Means of Locating Vessels at Sea
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