When I candled normal, intact, fresh eggs, I couldn't see the air cells. So I wondered how other folks knew when there were damaged ones. But I got some shipped eggs Friday, and they'd gotten badly tossed by the P.O., probably a sorting drum or something. 3 badly cracked, 2 were oozing, then when I was sealing the cracks with wax, and checking the other eggs again, I found another cracked one. When I candled them, I clearly saw little air cell sized bubbles in almost all of them. There were a few that looked like they had sort of splattered air cells, staying in one place, but spread out in odd shapes. I guess the membrane cam loose from the shells in places, but didn't break. I think the free-floating bubble probably means the membrane ruptured, probably flattened again the shell, and the air bubble is just floating around in the white. I still can't really see the air cells in normal eggs. I wonder why, it doesn't make sense to me. The seller is sending me replacements, at no charge, for which I am extremely grateful. I wasn't expecting that, it's a very kind and generous gesture.