PREFACE V 



mathematics, rheumatism, multiple sclerosis, hereditary- 

 ataxy, Meniere's disease, chorea of all forms, eye defects 

 of all forms, otosclerosis, pecuUarities of hair, skin and nails 

 (especially red hair), albinism, harelip and cleft palate, 

 pecuUarities of the teeth, cancer, Thomsen's disease, hemo- 

 philia, exophthalmic goiter, diabetes, alkaptonuria, gout, 

 peculiarities of the hands and feet and of other parts of the 

 skeleton. We do not appeal primarily to physicians for this 

 information but to the thousands of intelligent Americans 

 who love the truth and want to see its interests advanced. 

 At the same time, physicians can aid in the work by in- 

 ducing persons with bodily or mental peculiarities that run 

 through their families to send to the Record Office for 

 blank schedules on which to record the method of inherit- 

 ance of the trait in question. Thus every one can share in 

 the eugenics movement. 



The Eugenics Record Office will be glad to assist in the 

 establishment of local eugenics societies which shall become 

 centers for the study of local blood-lines and for local in- 

 struction. The Office seeks to assist state officials in the 

 study of the classes which are supported and protected by 

 the State, and to assist the States to locate the centers in 

 which their defectives and delinquents are being bred. It 

 is believed that a little money spent in studying the sources 

 of reproduction of persons who are destined to become state 

 wards will prove a highly profitable investment, since it 

 may lead to steps that will diminish such reproduction. 



In the preparation of the present volume the author has 

 been aided by many hands. Professor James A. Field, of 

 the University of Chicago, has kindly read the proof and 

 made valuable suggestions. The bibliography and the pedi- 

 gree charts were largely prepared by Miss Amey B. Eaton, 

 of the Eugenics Record Office. Professor E. B. Wilson has 

 generously granted me the use of Figures 1 to 6 from his 



