Innervation of the Kidney.
—Serés1 considers in detail the anatomic and functional significance of renal innervation. He is of the opinion that the renal nerve supply not only influences the kidney by means of its effect on the circulation but also exercises a direct secretory or trophic influence on the kidney. He bases his opinion on work done on dogs by himself and Bellido, in removing the nerves from the renal pedicle. During the first days after the operation the degenerated kidney secretes more urine than the untreated fellow kidney. Likewise after the injection of solutions of sodium chlorid or sugar intravenously, diuresis begins earlier in the treated kidney and lasts longer. This polyuria lasts from eight to ten days. After a month the treated kidney shows degenerative changes. When the operation was performed only on one side the treated kidney showed only slight changes, but when both