Continuity mistake: Pilot: The mud on Dr. Quinn's face alters in size and shape between when she is meeting the Coopers and when she is upstairs in the room looking into the mirror. (00:09:00)
Continuity mistake: Pilot: After Dr. Quinn has had her tooth pulled, she talks to Mrs. Cooper, and her hair changes during shots, most noticeably on her forehead and near her left ear. (00:38:00)
The Healing - S1-E5
Continuity mistake: Before Loren's operation, when Dr. Mike shows Jake how to administer the chloroform, she holds the bottle in her left hand and the rag in her right hand, but in the next shot both items have switched to the opposite hands. (00:21:20)
Continuity mistake: When Michaela and Sully appologize to each other at the end of the episode, in the first shot, all of Sully's hair is behind the blue headband. In the next shot, his fringes are not underneath the band anymore. (00:45:30)
Continuity mistake: Matthew invited Ingrid to eat with them in the previous episode. In this episode, he acts like he's meeting her for the first time.
Answer: A Cooper was someone who made various things out of wood including wooden caskets and even barrels.