I'm reading this paper: https://www.jstage.jst.go.jp/article/jpsa/51/3/51_0130043/_pdf
From day 17 of the culture period until hatching, pure oxygen was supplied at a flow rate of approximately 500 ml/h through the previously installed plastic tube.
What kind of hardware is used to achieve this ? I would like to test this method, but I don't have access to laboratory equipment ( meaning .. I'm not going to buy expensive equipment for this hobby project..)
I'm used to incubate eggs inside an incubator, and day 17 is approximately the day when they start chirping, and sometimes hatching, so it's my understanding that at this point the chick starts to use its lungs, and breaks the shell in search of oxygen.
Also I don't understand the airflow in this setup: when I supply 500 ml/h of oxygen, where does the displaced gas go ?