Timing between first and second egg

[AJ83]

I know this is an old post, but my Black Australorp laid her first egg on 10/12/15 (40.7g) and her second egg today, 10/19/15 (44.8g).

 

[hallen01]

As a rule they will lay once every 24 hours. Mine were sporadic for about the first week or so but now they lay like clockwork. All 6 of mine are laying now and I get two to three a day. I have oyster shell in a separate container that they can access whenever they want it.