390 Life and Letters of Francis Galton
At this point Galton recognises two important matters, namely : (i) that these physical characters are in certain cases highly correlated, and that
GRADES of RANK, 0°To 100°
10° 20° 30° 40° 50° 60° 70° 80° 90° .100°
MALES
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STATURE, W
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MALES FEMALES
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MALES
FEMALES
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61
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|
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MALES |
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110
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FEMALES
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65 H70 75
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0° 10° 20° 30° 40° 50° 60° 70° 80° 90° 100°
MALES
FEMALES
65 n --- 75 --- i t30 -
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3"035 i4O - - i 4s ---{ 0
Diagram of Absolute Values at each Rank.
accordingly it is scarcely accurate to mark them independently, and (ii) that from the fitness point of view a vital capacity, for example, for a small man may be amply adequate, while the same vital capacity would be insufficient for a big man. If we judged independently by rank for vital capacity and stature, say
