In our previous works on the chlorine escape of chlorate cell, we suggested the increasing escape of chlorine with increasing draft of the cell. The experiment was undertaken to prove this point. The electrolysis was performed with draft of various strength of air, applied at the gas space on electrolytic solution in the cell. It is confirmed that, the proportionality of chlorine escape with draft holds good until the volume of air passing the cell reaches about 20 times that of electrolytic gas evolued.