| Large concave and convex spherical mirrors are standard
pieces of demonstration apparatus, and few of them have survived in apparatus
At the left is a mirror from the United States Military Academy at West Point. It was bought from Lerebours of Paris about 1830. The upright, reduced images tells us that this is a convex mirror.
The unmarked convex mirror at the right is in the Garland
Collection of Classical Physics Apparatus at Vandervilt University.