Posted on the right is a late Thirties article by Teet Carle (the old publicist for MGM) on how the brothers Marx figured out which gag created the biggest laughs; a few words about how the movies were tested in various cities prior to each release and how assorted jokes were recited to all manner of passersby for their effect.
Click here to read a 1951 article that Harpo Marx wrote about Groucho.
