them where it had least expected it, the shock or additional impetus given to the imagination by the disappointment or the discovery, in a matter of this indifference, will only vent itself in a fit of laughter.[1] The transition here is not from one thing of importance to another, or from a state of indifference to a state of strong excitement; but merely from one impression to another that we did not at all expect, and when we had expected just the contrary. The mind having been led to form a certain conclusion, and the result producing an immediate solution of continuity in the chain of our ideas, this alternate excitement and relaxation of the imagination, the object also striking upon the mind more vividly in its loose unsettled state, and before it has had time to recover and collect itself, causes that alternate excitement and relaxation, or irregular convulsive movement of the muscular and nervous system, which constitutes physical laughter. The _discontinuous_ in our sensations produces a correspondent jar and discord in the frame. The steadiness of our faith and of our features begins to give way at the same time. We turn with an incredulous smile from a story that staggers our belief: and we are ready to split our sides with laughing at an extravagance that sets all common sense and serious concern at defiance. To understand or define the ludicrous, we must first know what the serious is. Now the serious is the habitual stress which the mind lays upon the expectation of a given order of events, following one another with a certain regularity and weight of interest attached to them. When this stress is increased beyond its usual pitch of intensity, so as to overstrain the feelings by the violent opposition of good to bad, or of objects to our desires, it becomes the pathetic or tragical. The ludicrous, or comic, is the unexpected loosening or relaxing this stress below its usual pitch of intensity, by such an abrupt transposition of the order of our ideas, as taking the mind unawares, throws it off its guard, startles it into a lively sense of pleasure, and leaves no time nor inclination for painful reflections.