Tend steam pressure tanks to extract glue from bones.
What does a Pressure Tank Operator do?
Tends steam pressure tanks to extract glue from bones: Opens valve to admit steam into tank of bones, and observing gauges, adjusts pressure according to specifications. Shuts off steam and releases 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 preservative and adds it to glue in storage tank.