IT is exceedingly difficult to define a disease in which changing conditions Of mind are prominent and essen tial features — like insanity, for instance — and it is even more difficult to define a disease that is partly mental, partly physical; more the former at One time, more the latter at another. For this reason it is well that we are seldom called upon to define epilepsy in a Single phrase or term; but the growing medicolegal importance Of this disease in late years, an importance already too long neglected, requires that physicians on the witness-stand should be in a position to state in a satisfactory way how epilepsy in its great variety Of forms affects the person who has it, and to' tell in more or less general terms what the malady is and what it means.