Candling first incubated hatch: air-sack size questions HELP!

[arlosmine]

I have read several times that you can judge how to adjust your humidity by monitering the size of the air-sacks at various times during the hatch. However, I cannot find pictures or specific information about "correct" size of the sacks at various stages of development. My eggs are on day 10 and I could still have time to make adjustments if I knew how to judge what I am looking at! None of the egg candling picture pages that I have found address this. FRUSTRATED.

I get that humidity to low= air sack to big,

To high= air sack to small.

I need pictures or description of ratio ideals!

 

[katrinag]

http://www.msstate.edu/dept/poultry/avianemb.htm
Try here.

 

[freshegg]

good info thanks