The drawing below is from Gustave Eiffel's book describing the tower that bears his name. There are 53 of them in total.
XXIII ter. Edoux lift. Second floor and intermediate floor. Together, details
This board concerns the Edoux elevator, the one that goes up from the 2nd to the 3rd floor. It reads the technical description of the climbing device, a big pump and its tank. He also describes a large number of small devices related to this elevator, such as a clutch.