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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
- ↑ Reduced to standard age of twelve years.
