In To Kill a Mockingbird what chapter do jem and scout get air rifles?

In Chapter 10 (Page 99) of To Kill a Mockingbird

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When he gave us our air rifles Atticus wouldn't teach us to shoot. Uncle Jack instructed us rudiments thereof; he said Atticus wasn't interested in guns.
Atticus said to Jem one day, 'I'd rather you shot at tin cans in the backyard, but I
know you'll go after birds. Shoot all the bluejays you want, if you can him 'em, but remember it's a sin to kill a mockingbird.'