Circlulation is avery advanced alchemical skill that requires specalized equipment, called a system. 
	
	It consistss of a flask or container that is placed over a heat source the only opening has a tube or some of some sort going through a cooler substance usualy water and then connected to another flask on the end where the condensed vapors are collected.
	
	There are two types of "systems":
	
	# Open system, where at some point (usualy the collection end) is open to the air.
	# Closed system, where the entire system is sealed from the outside air.
	
	The correct use and function of this equipment will require a fair amount of skill and to get any predictable result will require fine tempature control.