Job Description:

• 1) Tends equipment that washes animal stock used to make glue and gelatin: Turns valve to start continuous flush of water into tub to wash foreign materials from stock.

• 2) Turns handwheel to actuate roller that kneads and turns stock in tub.

• 3) Turns off water and roller after time necessary to reduce foreign material to required level.

• 4) Drains water from tub and pumps specified amount of acid into tub to kill organisms in stock.

• 5) Tests concentration of acid-sample in tub, using titration, burette, and pH indicator, and adds acid to tub when necessary.

• 6) Drains acid from tub after prescribed time and washes stock with water.