... Time us. titer was recorded at appropriate intervals. The final titer was determined after 10 (11) S. Winstein, B. Morse, E. Grunwald, K. C. Schreiber, and J. Corse, (12) L. F. Fieser, "Experiments in Organic Chemistry," 3rd Ed. (revised), J . A m , Chem. Soc., 74, 1113 (1952). ...