What business part of the missionary society consist of?

Chapter 24 gives insight into white women's society. Scout's experience with the Missionary Society women is somewhat mixed. She observes the hypocrisy with which the women try to do good for a remote culture like the Mrunas, but neglect the needs and sufferings of the black community in their own town. Particularly disconcerting is the way the women discriminate freely against the blacks, complaining about "sulky darkies" and making ridiculous insinuations that black men, spurred on by the trial, will start coming into their beds.