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^{page 198 note 1} Ryle, G., The Concept of Mind, London, 1950, p. 9.Google Scholar

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^{page 199 note 1} The results can be learnt from Adrian, E. D., The Physical Background of Perception, Oxford, 1947, and his later papers.Google Scholar

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^{page 204 note 2} Craik, K. J. W., The Nature of Explanation, Cambridge, 1943.Google Scholar

^{page 204 note 3} It has been conjectured, without experimental support, that the rhythm of the electroencephalogram may be associated with this scansion mechanism.

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