(1) The work discussed herein was performed as a part of the research project sponsored by the National Science Foundation and by the Federal Facilities Corporation, Office of Synthetic Rubber, in connection with the government synthetic rubber program.(2) CE Dent and RP Linstead, J. Chem. Soc., 1027 (1934).(3) Private communication from Dr. FP Dwyer.(4)(a) H. Diehl, CC Hach, GC Harrison and LM Liggett, Iowa State toll. J. Sci, 21, ...