Paintings on glass

A colleague has miniature painted portraits on glass in cases
similar to those used for daguerreotype, ca. 1850, with flakes of
paint separated from the glass.  Does anyone have a recommendation
for readhering them?  In case it matters, the images are colored and
the glass is flat.  Any help or leads would be appreciated.

Gary Saretzky
Monmouth County Archives

                                  ***
                  Conservation DistList Instance 13:30
               Distributed: Wednesday, November 17, 1999
                       Message Id: cdl-13-30-017
                                  ***