Signedunsigned
FunctionWas used by Edwin Land in his research on color theory. They were fixed to slide projectors, like the ones described in the inv. numbers 2004-1-0159a, 2004-1-0161a, and 2004-1-0211. It is black because it was used in the black room where Land was doing his experiments on color theory.
ProvenanceThis object belonged to Edwin H. Land and came from the Rowland Institute, Harvard University. Gift of the Edwin H. Land Family.