[7] Isolation of a New Vasoconstrictor Substance from the Blood and the Adrenal Cortex, Jour. Am. Med. Assn., 1913, lxi, 2136.

[8] Stone, W. J.: The Differentiation of Cerebral and Cardiac Types of Hyperarterial Tension in Vascular Diseases, Arch. Int. Med., November, 1915, p. 775.

[9] Smith, W. H., and Kilgore, A. R.: Dilatation of the Arch of the Aorta in Chronic Nephritis with Hypertension, Am. Jour. Med. Sc., 1915, cxlix, 503.

[10] McCrae, Thomas: Dilatation of the Arch of the Aorta, Am. Jour. Med. Sc., 1910, cxl, 469.

[11] Stone, W. J.: Arch. Int. Med., 1915, xvl, 775.

[12] Robinson, G. C., and Bredeck, J. F.: Arch. Int. Med., 1917, xx, 725.

[13] Jour. Exper. Med., 1911, xiv, 217.

[14] Warfield, L. M.: Jour. Lab. and Clin. Med., November, 1917.

[15] From πιεσω to squeeze, oppress or distress. Hyperpiesis, therefore, signifies excessive pressure.

[16] I have found the small colorimeter made by Hynson, Westcott and Dunning, Baltimore, Mo., costing $5.00, a very practical instrument.