The Great American Medicine Show - S1-E8
Visible crew/equipment: After Sully and Dr. Mike bring drunk Franklin into the clinic Sully leaves, and when Dr. Mike passes the partition as she walks toward Horace, the blue, yellow, and red chalk T-marks are visible on the floor. (00:10:25)
The Great American Medicine Show - S1-E8
Visible crew/equipment: While Myra is lying on the table before her surgery Dr. Mike tells her she's almost ready to begin, then just as Horace is about to stand up the orange T-mark is visible on the floor. (00:38:30)
Answer: A Cooper was someone who made various things out of wood including wooden caskets and even barrels.