'Katz. Release of neural transmitter substances. Originals of figs.' The figures actually seem to relate to several articles with Ricardo Miledi (offprints enclosed), namely: 'The effect of temperature on synaptic delay' (J. Phys. 1965), 'The statistical nature of ACh potential' ( J Phys. 1972),' The binding of ACh to receptors' (J. Phys. 1973), 'Microphysiology of the neuromuscular junction' (Bulletin of John Hopkins Hospital 1958) and 'The effect of atropine' (Proc. Roy. Soy. 1973). 1958-1973