Laurel Appel, visiting associate professor of biology and director of the McNair program, teaches participants how to extract DNA from wheat germ during the Green Street Arts Center's Sunday Salon Series, hosted by David Beveridge, pictured in back. Posted 03/17/08 In the 18th century, educated people in the upper reaches of society would meet at a salon to discus their ideas and observations. Today, this tradition continues without the pretentious aristocratic trappings at the Green Street Art Centers Sunday Salon Series. During the two-hour sessions held on Sundays throughout the academic year, Wesleyan faculty and staff speak to a general…