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OVEN TEMPERATURE MEASURING METER, 1950's

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OVEN TEMPERATURE MEASURING METER, 1950's

Method of measuring the temperature of an oven by the comparison of the colour of a lamp filament and the base of a flame. Inside is a small lamp whose brilliance is controlled by a large knob around the viewing tube. The operator views the bulb and the base of this flame through the tube, turning the large knob until the colour of the flame is the same as the bulb, the temperature is then read from the scale in Centigrade times 100.

Bruce Hammond Collection

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A1579



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