In the treatment of epilepsy numerous drugs have been acclaimed from time to time by different observers as sovereign remedies, and with few exceptions each in its turn has been discarded as of little or no value. Borax (sodium biborate) has been advocated repeatedly, and results reported by some have been remarkably satisfactory, while others have not found it worth while to persist in its use. Can these wide divergencies of opinion be explained? It would seem that as regards borax an explanation can be found from an analysis of the following results.