Performers are dressed in white coats like laboratory technicians. They go to a
selected location in the city. An area of a sidewalk is designated for the event. This
area of sidewalk is cleaned very thoroughly with various devices not usually used in
street cleaning, such as: dental tools, toothbrushes, steel wool, cotton balls with
alcohol, cotton swabs, surgeon's sponges, tooth picks, linen napkins, etc.
|[Street cleaners. John Houghton Hague, 1870s]|