Introduction: Hormonal Control of Volume and Electrolyte Content.- Control of Epithelial Cell Volume.- Similarities and Differences Between Renal and Intestinal Transport.- Polarity of the Proximal Tubular Cell: Comparison of Luminal and Contraluminal Transport Systems for Hexoses, Dicarboxylates, and Sulfate.- Hypertension: A Problem of Restricted Renal Volume Homoeostasis.- Studies on the Blood Pressure Increasing Mechanism of Mineralocorticoids.- Inhibition of the Angiotension Converting Enzyme: Progress in Cardiovascular Pharmacology.- Pathophysiology of the Acutely Failing Kidney.- Regulation of Fluid Transport in the Proximal Tubule of the Rat Kidney.- Endocrine Regulation of Potassium Transport.- Regulation of Extracellular Volume: Critical Evaluation of Natriuretic Hormones.- The Atrial Natriuretic Factor: Purification, Isolation of the Peptide and of PreproANF, and Physiological Studies.- Endogenous Inhibitors of Sodium and Potassium-Activated Adenosine Triphosphatase: A Potential Role for Body Fluid and Blood Pressure Regulation.