One of my objects in presenting the materialI am using for these lectures is to illustrate how
the investigation of human disease can contribute to physiological know-ledge, just as
physiology contributes to medicine, and I shall cite some cases in which present
physiological theory seems inadequate to account for the findings of the clinician. I intend
now to consider the excretion of certain electrolytes and of water, and then to pass on to the
more clinical problems of hypertension and renal anaemia.