en : ww Tt nl 3B. Experimentally Rw 457 074923) (0.007) = 427 reps/hr at 7 mg/ex* ph? { The two above approaches are within 26¢ of each other. If one extrapo= lates the experimental data from a sourre 0% 3.6 ng/ox~ to a thin source eye eet ee (for eorparative sure ses’ the tuo rethods ace within 29%,