Subasta Bidspirit | WALD GEORGE: (1906-1997) American Scientist,

WALD GEORGE: (1906-1997) American Scientist, Nobel Prize winner in Medicine, 1967. A good and length... - WALD GEORGE: (1906-1997) American Scientist, Nobel Prize winner in Medicine, 1967. A good and lengthy autograph statement signed, George Wald, two pages, 4to, Harvard University, Cambridge Massachusetts, 21st July 1952. Wald responds to few questions written to the heading, in French, in the collector´s hand. Wald states in part `..I have been working, for 20 years, at first alone, later with young colleagues, to learn something of the mechanism of visual excitation. Very early in this work I discovered the role of Vitamin A in vision. The visual pigments…and this is the reason why when vitamin A is lacking, the disease night-blindness develops. In the past ten years my colleagues and I have succeeded synthesizing..'. VG £200-300