1. Carlson, E. J., Flint, G., Gilbert, E. E., and Nychka, H. R., Ind. Eng. Chem.50, 276 (1958).
2. Cloney, J. M. and Mayhew, R. L., Proceedings 43rd Mid-Year Meeting of the Chemical Specialtics Manufacturers Assn., 132 (1957).
3. Epton, S. R., Trans. Faraday Soc.,44, 226 (1948).
4. Flint, G., “Encyclopedia of Chemical Technology,” Vol. 13, p. 501. Interscience Publishers New York, 1954.
5. Gilbert, E. E. and Jones, E. P., Ind. Eng. Chem.,43, 2,045 (1951).