The specimen is a stained thin section of human salivary gland infected with adenocarcinoma and double-stained using a mixture of FITC, lectin, and propidium diiodide. Photomicrographs were recorded utilizing a UPL 40x fluorite objective coupled to a WIB dichroic filter combination. A 5x projection photo eyepiece was used to transfer light from the intermediate image plane to the photographic emulsion.