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H. M. POLLOCK, B. MALZBERG AND R. G. FULLER 



tutions, and therefore do not conform to our definition. In order that the 

 statistics may be comparable, we do not include in the psychotic group 

 individuals classified merely as nervous, feebleminded, alcoholic, etc., unless 

 these were also associated with a definite psychosis. 



Tables 3 and 4 provide the data concerning the families of the 60 male 

 patients. 



There was a total of 1014 known relatives of the male patients. No 

 data could be obtained in 60 cases, leaving 954 with recorded histories. 



TABLE 4 



Classification of psychoses and other defects appearing among relatives of 60 male 



RELATIONSHIP 



Father 



Mother 



Paternal grandfather . , 

 Paternal grandmother . 

 Maternal grandfather . 

 Maternal grandmother 



Paternal uncles 



Paternal aunts 



Maternal uncles 



Maternal aunts 



Brothers 



Sisters 



Total 



Of these only 18, or 1.9 per cent, had a history of mental disease, whereas 

 we should have anticipated a total of 42.9 ± 4.3 cases, in accordance with 

 the general expectations in the State of New York. It is evident therefore 

 that the number of affected individuals is much less than one would expect 

 as a result of random sampling. Of course the generation of brothers and 

 sisters has not yet completed its span of life, and more cases of mental 

 disease may be expected before the family histories can be described as 

 completed. In order to change the results, so that the families of patients 

 would be significantly in excess of a random population with respect to the 



