22 



Fig. 10. A pedigree showing pauperism, insanity (black half circles), 

 and blindness in four generations (Lidbetter.) 



6 



Fig. 10 



Figs, n, 12, and 13. Three pedigrees to illustrate " antedating "; the 

 onset of insanity in the offspring is shown to occur at a much earlier age than 

 in the parents. These pedigrees also illustrate extreme cases of hereditary 

 transmission of the neuropathic taint; as a rule not more than one insane 



* 



$ 





l> 





42 



Fig. ii 



Fig. 12 



Fig- 13 



offspring of an insane parent occurs in four or five. The occurrence of in- 

 sanity in all the children is probably due to the fact that there is a 

 double insane inheritance in all these instances, although it is only shown 

 in one completely, and one partially. 



Fig. 14. Two total abstainers, but born of drunken parents (circles 

 with cross and with direct and collateral insanity in stocks (black figures), 

 give birth to eight children, the first two are healthy and grown up, the 

 second with numerous children ; then come two children (shaded circles) 

 dying in early life, followed by a son and two daughters (black figures) 

 all suffering from dementia of adolescence, and lastly a healthy daughter 

 with children. What we want to know is this : have all the unsound elements 

 been segregated out? This can only be ascertained by following up the 

 children of the sound or apparently sound members. 



