The importance of preserving architectural details in historic buildings, including window pane glass, is recognized. In his attempt to preserve the surviving crown-glass window panes at Colonial Williamsburg, the author experimented with Acryloid B-72 and Epo Tech 300 series epoxies. The B-72 was preferred. The treatments done will be closely monitored for several years. See also AATA 19-545 for related study and 21-1334 for reference to entire proceedings. -- AATA