Pressure-tank Operator
Overall rating: (N/A)
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Tends steam pressure tanks to extrcat glue from bones: Opens
valve to admit steam into tank of bones, and observing gauges,
adjusts pressure according to specifications. Shuts off steam
and relaeses pressure after required period, and drains glue
liquor into storage tank. Measures density and temperature of
liquor, and records hydrometer and thermometer readings on
control sheet. Weighs out specified amount of zinc sulfate
preservtaive and adds it to glue in storage tank.
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Pressure-Tank Operator
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