The following is a brief synopsis of some notes relating to the acidity of the fleces in epilepsy. These results were obtained and compiled as preliminary data, anticipatory to the carrying out of further investigations with regard to epilepsy. The fæcal acidity of 50 female epileptics, who were chosen at random from those undergoingtreatmentin hospital, was determined. These estimations were not detailed, but were of sufficient accuracy for comparative purposes. In each case the term “acidit” denotes that quantity of normal sodium hydroxide solution, measured in cubic centimetres, required to neutralize the total quantity of acids extracted from 100 grm. of the given specimen of fæces. Several analyses were carried out in each case.