Cross-striated muscles of frogs and rats were fixed in 3.3 per cent lead nitrate solution. Frozen sections 30 micra thick were mounted in different media and observed by polarization microscopy. The ...

Coërs, C., and Woolf, A. L., C. R. Cong. Médicins Aliénistes et Neurologistes, Liége, July 19–26, 1954; The Innervation of Muscle, 101 (Blackwell, Oxford, 1959).