Portrait of Jacobus Henricus Van 'T Hoff, a Dutch chemist who laid the foundations for stereochemistry. He was the first to receive the Nobel Prize for Chemistry. "Triangle Volume V No. 3 September 1961" appears at head of sheet.
Portrait of Frederick Gowland Hopkins, a famous pioneer of biochemical investigation. He shared the 1929 Nobel Prize for medicine. "Triangle Volume V No. 2 July 1961" at head of sheet.
Portrait of Sir Frederick Hopkins, founder of the Cambridge University School of Biochemistry. Nobel Prize winner, 1929, for his discovery of growth-promoting vitamins.
Photograph of August Krogh, who showed that blood capacity for oxygen is influenced by carbon dioxide tension. Krogh was awarded the Nobel Prize in Physiology and Medicine in 1920.