1. Harvey, E., Bioluminescence, 32 (Academic Press, New York, 1952).
2. McElroy, W., and Kipnis, D., J. Cell Comp. Physiol., 30, 359 (1947).
3. Van Schowenburg, K., thesis, Delft, Holland (1938).
4. Colwick, S., and Kaplan, N., Methods in Enzymology, 4, 383 (Academic Press, New York, 1957).
5. Pearse, A., Histochemistry, 510 (Little, Brown and Co., Boston, 1960).