I have learned so much from this thread--beginning to end. I just started incubating 24 shipped eggs today. First time incubating with shipped eggs. None broken. New to candling and unsure I think I might have one air cell that is like a level--the cell moves down the length of the egg and a second egg might have loose air cells floating around. I let them all sit for 22 hrs at room temp and then put them in the incubator with 22 eggs in the turner and 2 broken celled ones nearby to rest longer without turning. I'm unsure of the incubator temp as at one point I had about 8 thermometers (could've had more but ran out of nearby stores with different ones!) half reading 99.9 and the other half 101--so I'm hoping it's within that range and not higher! I'm using the default setting on the Hovabator 1588. The humidity ranges from 35-45%. Wish me luck!
I just wanted to add that I enjoy reading articles on the internet. If anyone is interested I found a cockatiel website that had many pictures associated with incubation and hatching. It explained so much about candling, assisting with hatches, examining eggs that didn't hatch. It has great pictures even though they are of cockatiels not chicks the same principles apply. Here are the links--make sure you scroll to the bottoms of the pages for the pictures..
http://www.justcockatiels.net/assist-hatches.html
http://www.internationalcockatielresource.com/candling-eggs.html
http://www.internationalcockatielresource.com/breakouthellipthe-inside-story.html
http://www.internationalcockatielresource.com/assisted-hatches-updated.html