A professional who assists naphthalene operator in separating naphthalene from chemical drain oil used to wash coke-oven gas or tar distillants. Respnsibilities include:

• Shovels crystallized naphthalene from cooling pans into wheelbarrow.
• Breaks up large pieces of naphthalene, and transports material to centrifugal drier.
• Performs other duties as described under helper master title.