Abstract
The chlorine content of the cerebrospinal fluid was measured in 106 cases of poliomyelitis. The chlorine level within one month after the onset of poliomyelitis is markedly higher compared with that in the healthy individual. The chlorine content in old cases differs little from that in the normal child. A rapid reduction in the chlorine content takes place following a treatment with the glutamylcholine-vitamin B_1 intraspinal injection method. The reduction is parallel with the recovery so that the greater the speed of recovery, the sharper is the reduction curve.