82 



THE FEEBI^Y INHIBITED. 



expected. But this departure is never a large one and may readily be 

 due to an imperfection in the record of the mood, either of one of the 

 parents or of the child in question. 



Finally, that all the facts may be available to the most critical 

 reader, enabUng him to judge for himself of the value of our compari- 

 sons, the legends of the 89 pedigree charts give the essential recorded 

 facts concerning the mood of each of the persons indicated, so far as 

 practicable, in the terms in which they were recorded. 



In the table the entries in the "offspring" columns are summed at 

 the bottom, and this column of sums is compared with hypothetical 

 expectation. In general, a fairly close parallehsm may be noted between 

 calculated and observed. Where an individual has been placed in a 

 column which should show no member by calculation, the "expecta- 

 tion" entry is a full-faced zero. These conspicuous zeros are a warning 

 of failures of actual to agree precisely with expectation. Though there 

 are several zeros (12), yet they amount to only 1.9 per cent of all 

 cases. The best test is afforded by the totals in the summary of 

 table C that is afforded by table D. 



The observed and expected totals in table D run fairly close, except 

 that there is an excess of normals (e2C2) and also of the nervous-cheerful 

 (E2C2). These excesses probably arise from a tendency on the part 

 of members of the family to call normal or only slightly nervous some 

 who are really more disturbed. Also, the excess of manic-depressives 

 (E2C2) is to be attributed to the fact that we started with State hospital 

 inmates and hence have selected many families just because they 

 showed (in abnormal proportions) the manic-depressed conditions. 

 Otherwise a comparison of the observed and expected totals speaks 

 for itself. 



Table C. — Distribution of progeny of the various matings compared with hypothetical 



expectation. 



Class I.— E2C2XE2C2. 



