Tiles: trades and tasks

Over the front doors of Cleveland School in south city is a series of nine trades or tasks being performed by seven men and two women. They are in high relief and very colorful.

Over in the How We Use Our Language Dept., it is interesting to me that the seven men are titled with their jobs, ie, Chemist, or Blacksmith. The two women are labeled with their tasks, ie, Churning and Spinning.

Why aren't the men Glassblowing and Blacksmithing? Or, the more interesting question, why isn't the one woman a Churner and the other a Spinner?