EXCITATORY AND INHIBITORY PROCESSES 231 



Steinmann, E. and Sjostrand, F. S. (1955) The ultrastructure of chloroplasts. Exp, Cell 



Res. 8 : 15-22. 

 SvAETiCHiN, G. (1956) Spectral response curves from single cones. Acta Phvsiol. Scand. 



39 : 20-46. 

 Szent-Gyorgyi, a. (1941) The study of energy-level in biochemistry. Nature, Loud., 148; 



157-159. 

 SzENTAGOTHAi, J. (1961) Anatomical aspects of inhibitory pathways and synapses. This 



volume, p. 32. 

 Tasaki, I. (1959) Resting and action potentials of reversed polarity in frog nerve cells. 



Nature, Lond. 184 : 1574-1575. 

 Tasaki, 1. and Hagivv'ara, S. (1957) Demonstration of two stable potential states in the 



squid giant axon under tetraethylammonium chloride. /. Gen. Physiol. 40 : 859-885. 

 Tasaki, I. and Spyropoulos, C. S. ( 1 958) Nonuniform response in the squid axon membrane 



under '"voltage-clamp". Ainer. J. Physiol. 193 : 309-317. 

 Wald, G. (1950) The interconversion of the retinenes and vitamins A in vitro. Biochim. et 



Biophys. Acta 4 : 215-228. 

 Wald, G. and Brovv'N, P. K. (1956) Synthesis and bleaching of rhodopsin. Nature, Lond. 



Ill : 174-176. 

 Wall, P. D. (1958) Excitability changes in afferent fibre terminations and their relation to 



slow potentials. /. Physiol. 142 : 1-21. 

 Wall, P. D. and Johnson. A. R. (1958) Changes associated with post-tetanic potentiation 



of a monosynaptic reflex. J. Neurophysiol. 21 : 148-158. 

 Watanabe, a., and Bullock, T. H. (1959) Modulation of activity of one neuron by 



subthreshold slow potentials in another. Fed. Proc. 18 : 167. 

 WiERSMA, C. A. G., Furshpan, E. and Florey, E. (1953) Physiological and pharmacological 



observations on muscle receptor organs of the crayfish, Caniharus clarkii Girard. 



J. E.xp. Biol. 30 : 136-150. 

 WoLKEN, J. J. and Palade, G. E. (1952) Fine structure of chloroplasts in two flagellates. 



Nature, Lond. 170 : 114-115. 



