Signedunsigned
Inscribedon tin case: 10 80
FunctionAnamorphosis mirrors were used with specially designed distorted cards. The image on such a card looks distorted because it has to be seen through the reflection of a convex mirror. These cards and mirror can function as demonstration tools in studying optics or simply as entertaining toys.
For a visual representation, go to the following website.
Published ReferencesDavid P. Wheatland, The Apparatus of Science at Harvard, 1765-1800 (Cambridge: Harvard University Press, 1968), 125.