Volume 113, Issue 17
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Features
Recent Advances in Wireless Measuring Instruments
An Instrument for Determining Logarithmic Decrement of Transmitters
The 350-Mile Astor Cup Auto Race
American Cars Win First and Second Place in Record Time
Strategic Moves of the War, October 14th, 1915
Portraying the Little Things of Nature
How to Arrange the Camera for Photomicrographs and Photorhacrographs
Paving River-Beds with Concrete
New System of Laying Concrete Floors and Walls to Confine River Waters to Their Course
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