fulling:
Archaeologists have uncovered a craftsmen’s district that features the significant ruins of a mill for fulling, a cleansing step in textile processing. In Roman times, fulling was conducted by slaves, who worked the cloth while ankle-deep in tubs of human urine—a resource so central to the business that it was taxed. [Archaeology, Off The Grid column (November / December, 2016)]
Makes you wonder about all the bellyaching about taxation today. I’m seeing a little meter next to every toilet…