“…Reversible Reiial Failure.-An entire monograph has been devoted to this obviously important topic (Atlas and Gaberman, 1958) ; but it is mainly devoted to acute renal insufficiency, though some account is given of renal damage associated with hypercalczmia. When this is due to hyperparathyroidism, excessive ingestion of milk and alkali, calciferol intoxication, sarcoidosis, or prolonged skeletal immobilisation, it is potentially reversible, and early renal damage may be arrested.…”