What is dry incubation?

[C&Rman]

What is it and does it work?????

 

[Griffin Nest]

its supposed to be just not putting water in the first 18 days and the last 3 days put water in and make it between 60% and 70%.
i tried it for the first time. my chicks had a VERY hard time coming out. took 'em 3 days just to come out all the way