Polarimetry has been used to detect the occurrence of configurational changes accompanying denaturation in various proteins (Jirgensons, 1950, 1951, 1952; Kauzmann el al., 1953; Yang and Foster, 1954; Linderstrf~mLang and Schellman, 1954). However, because of the present incomplete knowledge of protein structure, no concrete proposals have yet been made connecting observed rotational values and...