October 23, 1915
1 min read
The Gyrotelescope, Oil-Burning Furnace for Heat Treatment of Automobile Springs and more
Includes an article on the Sperry gyrotelescope, an aiming device for aerial bombing
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October 23, 1915
1 min read
The Gyrotelescope, Oil-Burning Furnace for Heat Treatment of Automobile Springs and more
Includes an article on the Sperry gyrotelescope, an aiming device for aerial bombing