A professional who tends equipment that sublimates (refines by vaporization) crude salicylic acid derived from coal tar. Respnsibilities include:

• Weighs specified amount of salicylic acid and dumps it onto conveyor leading to sublimation unit.
• Starts fans that circulate heated air in unit to promote vaporization of salicylic acid.
• Starts pump to draw salicylic-acid vapor through filters into condenser tanks where salicylic acid recrystallizes.
• Keeps daily production records.