The accompanying records are illustrative of the article by the present authors on "The Inhibition of Pancreatic Activity by Extracts of Suprarenal and Pituitary Bodies," appearing in the Archives of Internal Medicine, Vol. I, No. 6, July, 1908, pages 628-647. They show the inhibitory effects of the intravenous injection of extracts of the suprarenal and pituitary bodies into dogs whose pancreatic juice has been excited by secretin.
It is to be regretted that it is impossible to reproduce more of the records, especially those which illustrate the prevention of excitation of pancreatic flow when the dose of secretin is preceded by an injection of suprarenal or pituitary extract. Under these circumstances the inhibition is more marked, but its proper exposition requires the consideration of a number of lengthy control records whose publication is impracticable. This is also true of those records which illustrate the inhibitory factor of suprarenal