“…Although Bunch (1900) found a shrinkage in volume of the gland under sympathetic stimulation, he observed that it was followed by a swelling. Cattell et al (1934) found the blood flow to be reduced; but Carlson (1907), Carlson and McLean (1908), and Barcroft and Piper (1912) were all agreed that the constriction was transitory and was followed by a longlasting and considerable dilatation, so that the blood flow through the gland was mainly increased.…”