The fluorescence was produced by the radiation from a Cooper Hewitt quartz mercury vapor lamp. A Corex "A" blue purple filter was used to filter out that part of the spectrum of the exciting light in which the fluorescence appeared. The filtered light, which was almost entirely ultraviolet, was focused directly onto the surface of the cod liver oil by means of a quartz lens.
Proceedings of the Iowa Academy of Science
©1929 Iowa Academy of Science, Inc.
Morehouse, C. A.
"The Fluorescence of Cod Liver Oil,"
Proceedings of the Iowa Academy of Science, 36(1), 297-297.
Available at: https://scholarworks.uni.edu/pias/vol36/iss1/76