“…However, since far fewer vibrational modes are "active" in this stimulated effect than in the spontaneous effect, and most of the work reported remains concentrated on a very small number of chemical systems, there still is little to report of great chemical interest. The papers listed in the bibliography deal with intensity and gain measurements, thresholds, temperature effects, angular dependence, and stimulated scattering by polaritons (412)(413)(414)(415)(416)(417)(418). A paper on Raman linewidths for stimulated threshold and gain calculations (419) describes a good method for getting pre- cise line shapes for liquids.…”