1. Niegisch, W. D., Fourth Meeting, Polymer and Fiber Microscopy Soc., Norwalk, Connecticut (May, 1961).
2. Smith, J. W., Electric Dipole Moments (Butterworth Scientific Publications, London, 1955).
3. Lazurkin, Yu. S., and Fogelson, R. L., Zhur Tekh. Fiz., 21, 267 (1951). Robertson, R. E., J. App. Polymer Sci. (in the press).