A professional who tends furnace and shaker screens to produce boneblack animal charcoal from ground bones. Respnsibilities include:

• Turns dial on control panel to start feed of ground bones to furnace and turns handwheel to adjust oscillating speed of shaker screens to maintain uninterrupted production.
• Observes recording thermometer to verify specified temperature in furnace.
• Inspects conveyors, vibrating feeders, and shaker screens for clogging or malfunction.
• Tightens drive belts, using wrenches and other handtools.
• Gives directions to other workers in spreading boneblack over cooling floor and in loading cooled boneblack onto conveyors.