A professional who assists heater II in carbonizing coal. Respnsibilities include:

• Turns handwheel to open and close decarbonizing caps which admit air to flues to burn carbon from gas and air nozzles.
• Observes pressure gauges, and notifies heater II if pressure varies from specified limits.
• Reads pyrometer to determine oven wall temperature.
• Cleans carbon from plugged nozzles, using poker, and replaces broken nozzles, using handtools.
• Turns handwheel in emergency to operate automatic reversing machinery.
• Cleans and lubricates equipment.
• Performs other duties as described under helper master title.