View of a Detroit bus in a Whiting mechanical bus washer in Coolidge terminal. Man stands with brush in background. Typed on back: "No. 21-115. Whiting mechanical bus washer. Type C.E.R., showing top brushes. Bus starting through washer. Note: How brushes at eaves follow contour of bus." Stamped on back: "Built by Whiting Corporation, Harvey, Ill. (Chicago Suburb)." Handwritten on back: "Coolidge terminal, 1948."