บท 378: Oxygen and Nitrogen

Agatha, Sylvie, Chavez and Kyle Sichi would conduct the experiment. Carter, Iron Axe, Barov and all the other witches of the Witch Union were also required by Roland to come to the lab, as it was an experiment of great practical and educational significance. The fifth laboratory was chosen for this event, given that it was the largest lab and had enough space for the two dozen people.

Considering the experiment was the first of its kind, Roland had built a tower-shaped vessel which was only as tall as a man with a diameter of one meter instead of a giant fractionation vessel. The inside of the vessel was divided into three parts. The air would enter the vessel through the bottom part and come out through the two parts above.