he Pioneer Instrument Co. under thename air distance recorder. The instrument is similarto an odometer in appearance. The instrument is actuated by a device called a trans-mitter which has a propeller rotated by passage of theplane through the air. Once a mile this propeller actuatesa valve which… … Details of Pioneer Air Distance Recorder Automotive hidustries, August 17, 1922 Proper Highway Finance Essential toAutomotive Progress The building of highways should be put upon a sound economicbasis. Adequate maintenance funds must be provided. Co-ordi-nation of various highways needed. Deferred…
Automobiles · Aeronautics
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