feature of life in the rural, mountain, and
backwoods areas of the U.S.A., the so-called
"physick" wagon was a familiar sight as late
as the 1930s.
Many a black and
Country performer served his apprenticeship
working to help a quack sell his medicines to
used song and dance men to attract and hold a
crowd; in addition, some of the performers
helped mix the "medicines" and sell
Arnold Shaw -
American Dictionary of Pop / Rock.