Read it through once

"Why, you see, the girls are always buying them, and unless you want to be thought mean, you must do it, too. It's nothing but limes now, for every one is sucking them in their desks in school-time, and trading them off for pencils, bead-rings, paper dolls, or something else, at recess. If one girl likes another, she gives her a lime; if she's mad with her, she eats one before her face, and don't offer even a suck. They treat by turns; and I've had ever so many, but haven't returned them; and I ought, for they are debts of honor, you know."