a case, one pushes further and further afield, often only stopping on the very brink of disaster. The counter-tendency then steps into the place that has been vacated; alone, in its turn, it will go as far as it can go. If the other was called action, then this will be reaction. As the two tendencies, if they had journeyed together, would have moderated each other, as their interpenetration in an undivided primitive tendency is the very definition of moderation, the mere fact of taking up all the room imparts to each of them such an impetus that it bolts ahead as the barriers collapse one by one; there is something frenzied about it. Now we must not make exaggerated use of the word "law" in a field which is that of liberty, but we may use this convenient term when we are confronted with important facts which show sufficient regularity. So we will call law of dichotomy that law which apparently brings about a materialization, by a mere splitting up, of tendencies which began by being two photographic views, so to speak, of one and the same tendency. And we propose to designate law of twofold frenzy the imperative demand, forthcoming from each of the two tendencies as soon as it is materialized by the splitting, to be pursued to the very end as if there was an end! Once more, it is difficult not to wonder whether the simple tendency would not have done better to grow without