Part Two1 of this paper consists of abstracts of histories of the author's seven cases. The case histories are adequate, but the author fails to classify the

one case he presents in some detail. Of the other cases, three illustrate the 'communicated' type, two the 'imposed' and one the 'induced'. These illustrative cases are satisfactory and appear to have been well studied.

There is a brief discussion of 'Mass Psychosis' in which the author deplores the attempt of other writers to extend psychiatric diagnosis to the field of sociology. He makes the point that 'unorthodox behavior of large groups' should not be classified in the same category with the disorders which arise within the family unit on the grounds of association and identification.