72 Proceedings of the Royal Society of Edinburgh. [Sess. 
RoJandic cortex of one hemisphere, marking upon the sketch the position 
of points stimulated. In order to obtain a composite picture of the relation 
of the areas to the convolutions, we transferred our markings of the results 
of each experiment to the hardened brain of a Macacus and photographed 
them. 
Our results are shown in figs. 1 and 2. 
During the course of our investigation, Sherrington has published a 
diagram of the convexity of the hemisphere of Cercopithecus callithrix * 
which illustrates the changes produced by tetanus toxin in the functional 
topography of the motor cortex. The outlines of the various centres 
depicted in this diagram show that this observer had, by the use of unipolar 
faradisation, arrived at conclusions with regard to the areas figured by him 
similar to those which we have reached by our method of isolation. 
V ogt f also, in a recent paper, states that he has confirmed Sherrington’s 
results by unipolar faradisation in the orang, and records stimulation 
experiments on the lower apes with results which accord with those of 
Sherrington and are similar to those which we have obtained. 
* The Integrative Action of the Nervous System ,, p. 297. 
t Anatomischer Anzeiger, Erganzungsheft zum xxix. Bd., 1906, p. 74. 
