I am going to spend the next several days linking to these depictions of African-Americans in 19th century magazines from the New York Public Library collections and usefully linked to by the always excellent Sociological Images.
"Wife: I wish you were not allowed in here."
This image shows segregation as a good thing. Because blacks can't be served by whites, they can't go into taverns. Thus, blacks are saved from the scourge of alcohol. It's absurd on the face of it, but useful in showing how whites could justify segregation in any number of ways.