“…Another group of articles is concerned with the molecular theory of the viscous flow of colloidal or highpolymeric systems (6,144,149,160,167,170,206,220,283,300,331,335,348,368,399,442,498,550) and one of the supplements of the Progress of Theoretical Physics contains review articles on this subject (170). The books and articles on rheology mentioned below are also relevant.…”