THE EFFECT OF CUTTING UPON THE RATE OF HAIR GROWTH

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Abstract
The weights of hair shaved from the face of man showed that the rate of growth was most rapid immediately after cutting, the rate gradually lessening as the time of cutting became more remote. Daily measurements of hair growth during 2 consecutive summer seasons showed well marked differences for which no explanation is offered; the 2 series corresponding, however, in the relative growth rates in relation to the time elapsing since the hair was cut. No correlation could be found between growth rate and external temp. Control measurements indicate no effect upon the rate of hair growth as a result of the hyperemia accompanying the process of shaving.

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