With regard to the study of inheritance of abnormali- 

 ties and disease, however, considerable progress has been 

 made, and, strange to say, some of these are dominant to 

 the normal. (See page 168). 



Moreover, a study of pedigrees of certain families dis- 

 closes the fact that undoubtedly bad and undesirable mor- 

 al and mental characters, as well as good and desirable 



,(1 



Sh® 



(b^fhlkr® ir® 



(N) [n] (N) (N) [n] lk\ HHSW^ 

 N 



N N N 



EM* 





N 



6(^(^6 1^ lai iid^ I^ di b 



J.. C. a 



l-nltn'l 



Fis- 2;t. — In these diagrams the circle represents a female, 

 the square a male. N inside a circle means normal: F on a 

 black background means feeble-minded; A alcoholic; T. tuber- 

 cular; Sx, sexually immoral; Sy, having syphilis. 



ones, often akin to genius, are inherited. (Read the story, 

 of the "Jukes," the "Kallikak," the "Nam," the "Ed- 

 wards," the "Darwin," the "Bach," the "Zero," the 

 "Hill Folk " the "Pineys" and other families). 



A critical study of many family records has been made 

 in recent years by Dr. H. H. Goddard, Dr. C. B. Daven- 

 porfi and others in the United States, and by the Galton 

 Laboratory for Research in England. The results are such 

 as to convince the thoughtful of the terrible consequences 



(1) — Prof. C. B. Davenport, the noted American experimental biologi.st 

 and geneticist, was born in 1866 and educated at the Brooklyn 

 Polytechnic and at Harvard. He acted as instructor in Zoology 

 at Harvard (1888-1889), and was Professor of Zoology, Chicago 

 University (1899-1904), and is now Director of the Biological 

 Laboratory. Cold Spring Harbor. L. T. He has published several 

 valuable works in Experimental Zoology. 



KM 



