On Nutrition and Sex-determination in Man. 

 Fig. 2. 



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~16" 18 20 22 24 26 28 30 32 34 36 

 17 19 21 23 25 27 29 31 33 35 37 



Age of Mother. 



curve represented by continuous, ¥ curve by broken line. 



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Fig. 3 



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