130 The Third and Fourth Generation 



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NF type mate, their offspring would be expected 

 to give 3 normals to i 

 feeble-minded. Out of 

 146 children produced by 

 33 such matings Goddard 

 found 39 were feeble- 

 minded. 



The first of Goddard's 

 charts (Fig. 10) illus- 

 trates the family tree of 

 Gertie K., a girl of 12 

 years, with the mental 

 development of a child 

 of 7. Males in this and 

 the following chart are 

 represented by squares, 

 females by circles. Note 

 that this girl has a feeble- 

 minded brother and that 

 both her parents are 

 feeble-minded and see the 

 appalling array of feeble- 

 minded cousins, aunts, uncles, and other rela- 

 tives. Her grandmother passed for a normal 



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