GEORGES DREYER was bom on July 4, 1873 at Shanghai, where his father, Capt. G. H. N. Dreyer of the Danish Royal Navy, was stationed at the time. He was educated in Copenhagen, where he qualified in medicine in 1898 after a very brilliant career as a student. While serving as a medical officer in the Navy, he found time to do some work with Salomonsen in the Pathological Department of the University, and continued this later when he was house physician at the fever hospital. For a time he was responsible for the production of diphtheria antitoxin at the newly established Serum Institute, and he received his M.D. degree in 1900 for a thesis on diphtheria toxin and antitoxin. Dreyer became a Privatdocent in the University of Copenhagen, and carried on an astounding amount of research on a wide variety of subjectstyphoid agglutination, the effect of light on bacteria and protozoa, the action of enzymes, and other subjects. An interest in mathe matics had been-early stimulated by his father, and in all his varied research he attempted to obtain accurate quantitative results. He found existing methods unsatisfactory for exact quantitative work, and developed new technique in many branches of biological research. He travelled extensively in Scandinavia, Germany, France and England, and came into contact with the leading workers in many fields. An excellent linguist, he spoke Danish, French, German and English fluently.