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Client: Koehler Manufacturing Company<br />
Ad Agency: W.F. Minnick & Associates<br />
Product: Mark II Wheat Lamp<br />
Location: Brady Stewart Studio, 725 Liberty Avenue in Pittsburgh<br />
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A wheat lamp is a type of incandescent light designed for use in underground mining, named for inventor Grant Wheat.<br />
For use in hazardous areas such as firedamp and coal dust, the lamp is mounted on the front of the miner's helmet and powered by a wet cell battery worn on the miner's belt.