Page:Popular Science Monthly Volume 71.djvu/406

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400
POPULAR SCIENCE MONTHLY

between brethren for like characters; we notice that the resemblance lies between .5 and .6.

Table II.
Inheritance of Physique
Paternal Inheritance. Males Only
Method Authority Ages Intensity
Family measurements:
Stature Pearson and Lee Adults .51
Span """ " .45
Forearm """ " .42
Family records:
Eye color """ " .55
Fraternal Inheritance
Family measurements:
Stature Pearson and Lee Adults .51
Span """ " .55
Forearm """ " .49
Family records:
Eye color """ " .52
School observations:
Eye color Pearson Boy and boy .54
School measurements:[1]
Head breadth " """ .59
Head length " """ .50
Head height " """ .55
Cephalic index " """ .49

Mean paternal value, .48. Mean fraternal value, .53.

For both parental and fraternal inheritance in man we find for physical characters much the same values as we find in the cases of cattle, horses and dogs. This is illustrated in Table III.

Table III.
Parental Inheritance in Different Species
Species Character Mean value No. of Pairs used
Man Stature .51 4,886
Span .48 4,873
Forearm .42 4,866
Eye color .50 4,000
Horse Coat color .52 4,350
Basset hound Coat color .52 823
Greyhound Coat color .51 9,279
Aphis Right antenna .44
Frontal breadth 368
Daphnia Protopodite .47
Body length 96
Mean —— .48

Turning now to diseased or pathological cases, we have at present only three types that have been dealt with. These are Mr. Edgar


  1. Reduced to standard age of twelve years.