Walter Kidd, Initiative in Evolution
“ Be this as it may, we need not carry our search for the use of harness to this hoary antiquity, but know well from history that for many thousands of years man has been employing harness on his friend and servant, thus making the essential conditions for an experiment of which he and his servant were alike unconscious, that is to say, he influenced a growing living structure, the horse’s hair, by the artificial force of pressure, applied to the coat at various points. ”
