Single-stage auto-cascade build

[[486]]

NOL, not to thread crap, but what does it mean for a gas to 'sponge'?

The gasses sort of dissolve into each other, like CO2 into a can of soda. When a low boiling point gas dissolves into a higher boiling one it lowers the boiling point of the higher one without raising pressures much.
I wish more people on the 'net worked on autocascades, they're awfully interesting.

This was completed and sold already...

Oh...