A matted, 50 cm by 58 cm, black and white photograph collage of personnel who had worked at various times in the Chemical Engineering Branch in Bldg. 250 at CRNL. This version of the photograph was assembled about 1970. The right-hand photo has names of personnel added, where known. Slightly different versions of the collage were made as retirement gifts for different people. See artifact 2019-087 for a similar collage assembled by Al Bancroft, but believed to have been generated several years earlier.