The American physiologist, oenologist, publicist and university lecturer Maynard A. Amerine (1911-1998) was appointed to the Viticulture Department at the University of California in 1935, which was revived after the American prohibition (1920-1933). He was later to head it for five years from 1957 to 1962. Amerine began his work by analysing numerous European (of which he imported hundreds from Spain, Italy, France and Greece) and American grape varieties and created an extensive herbarium. This was then completed after him by Dr. Harold P. Olmo. He was also intensively involved in the re-education of winegrowers, as this knowledge had been largely lost during the Prohibition, because many companies and winegrowers had stopped producing wine.