Thanks to all who provided directions to major collections of the work of
Duchamp.  Our search located an object very much like the one we are
studying  --  a book cover decorated with velvet and a single foam
breast.  In each case, the foam has oxidized severely, causing it to
become yellow and embrittled.  We are determining the composition
of the foam so we have a better idea of why it has degraded, and how
the remainder of it can best be preserved.  Having a comparative
object will help.

Thanks again.

James Martin
Director of Analytical Services
Williamstown Art Conservation Center