Members of Symposium 
A. S. PARKES 
Mary Marshall Professor of the Physiology of Reproduction, Physiologi- 
cal Laboratory, University of Cambridge, since 1961. 
Hon. Lecturer, University College, London, 1929-31; member of staff, 
National Institute for Medical Research, London, 1932-61; Ingleby 
Lecturer, University of Birmingham, 1940; Addison Lecturer, Guy’s 
Hospital, 1957; Chairman, Society for Endocrinology, 1946-51; Society 
for the Study of Fertility, 1950-52; President, Institute of Biology, 
1959-61. Fellow of Christ’s College, Cambridge; Fellow of University 
College, London. 
Publications include: The Internal Secretions of the Ovary; and editor of, 
and contributor to Marshall’s Physiology of Reproduction, 3rd edition. 
G. Pincus 
Research Director, Worcester Foundation for Experimental Biology, 
Shrewsbury, Mass., since 1956; Research Professor of Biology, Boston 
University Graduate School, since 1950. 
Prof. of Experimental Zoology, Clark University, 1938-44; Director of 
Laboratories, Worcester Foundation, 1944-56; Research Professor of 
Physiology, ‘Tufts Medical School, 1946-50. Albert D. Lasker Award in 
Planned Parenthood, 1960. 
Publications include: Recent Progress in Hormone Research (ed.); The 
Hormones (edited with K. V. Thimann). 
N. W. Pirie 
Head of Biochemistry Department, Rothamsted Experimental Station, 
Harpenden, Herts., since 1947. 
Demonstrator in Biochemical Laboratory, Cambridge, 1932-40; Virus 
Physiologist, Rothamsted Experimental Station, 1940-46. 
Publications on biochemistry, especially on the separation and properties 
of macromolecules; articles on viruses, the origins of life, biochemical 
engineering, and the need for greatly extended research on food produc- 
tion and contraception. 
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