152 CARNEGIE INSTITUTION OF WASHINGTON. 



accordingly made such studies from February to June 1920, and has 

 deposited the results with the Office. Of the M family group a pedi- 

 gree chart including 78 individuals was prepared, and of these 11 were 

 given the standard test. Of the L family there are 38 individuals re- 

 corded, of whom 6 were tested. Of the B family 77 individuals are 

 recorded and 12 tested. Of the K family 78 individuals are recorded 

 and 8 tested. Of the S family 113 individuals are recorded and of 

 these 21 tested. The results are being analyzed. 



THE FAMILY OF ISHMAEL. 



Dr. Arthur H. Estabrook is continuing his studies on this group, 

 continuing the work of Mr. MacCulloch of a generation ago. The 

 more important subfamilies of the group have been completely studied 

 and written up for final use. Many smaller families, closely connected 

 with these, have been studied; they are now being worked up to final 

 form. Pauperism seems to be the most important characteristic of 

 this group ; and the feeble-mindedness is, in general, of the higher grades. 

 The other anti-social traits are closely allied to the feeble-mindedness. 

 In connection with this pauperism, the report will include a study of 

 the social forces at work here in the past. Approximately 10,000 indi- 

 viduals are under study. 



OTHER FIELD WORK. 



Dr. Elizabeth B. Muncey has been carrying on field-work on twin- 

 producing families and, incidentally, on other families occurring in 

 the locality in which she has been working. 



LIBRARY WORK. 



Miss Mabel L. Earle has continued to furnish extracts of the litera- 

 ture on special subjects, as required for the use of the Office. She spent 

 three months at the Surgeon General's Library in Washington, ab- 

 stracting literature which was not available in the Boston and New 

 York libraries. Miss Earle spent some time at Cold Spring Harbor in 

 work upon the library here. She has also sent in several hundred 

 sheets of typewritten abstracts on various topics, especially on those 

 relating to human reproduction and to twinning. Dr. Muncey has 

 also made abstracts of the literature on twins. 



INBRED COMMUNITIES. 



A further analysis of the data obtained on the populations of cer- 

 tain island communities has been made by Miss Mary M. Sturges. 

 It is hoped that during the autumn of 1920 some additional field- 

 work to clear up certain remaining points will be made. 



ANTHROPOLOGICAL STUDIES IN THE ARMY. 



As indicated in the last report, a "First study of the records on 

 drafted men and the defects found in them" was published by the 



