In his great work on Divergent Lines of Racial Evolution, the learned and ingenious Professor Brayfugle argues from the prevalence of this gesture--the shrug--among Frenchmen, that they are descended from turtles, and it is simply a survival of the habit of retracting the head inside the shell. It is with reluctance that I differ with so eminent an authority, but in my judgment (as more elaborately set forth and enforced in my work entitled Hereditary Emotions -- lib. II, c. XI) the shrug is a poor foundation upon which to build so important a theory, for previously to the Revolution the gesture was unknown. I have not a doubt that it is directly referable to the terror inspired by the guillotine during the period of that instrument's awful activity. GUNPOWDER, n. An agency employed by civilized nations for the settlement of disputes which might become troublesome if left unadjusted. By most writers the invention of gunpowder is ascribed to the Chinese, but not upon very convincing evidence. Milton says it was invented by the devil to kill angels with, and this opinion seems to derive some support from the scarcity of angels. Moreover, it has the hearty concurrence of the Hon. James Wilson, Secretary of Agriculture. Secretary Wilson became interested in gunpowder through an event that occurred on the Government experimental farm in the District of Columbia. One day, some years ago, some rogue, imperfectly reverent of his profound attainments and personal character, presented him with a sack of gunpowder, representing it as the seed of the Flashawful flabbergastor, a Patagonian cereal of great commercial value, admirably adapted to this climate. The good Secretary was instructed to spill it along in a furrow and afterward inhume it with soil. This he at once proceeded to do, and had made a continuous line of it all the way across a ten-acre field, when he was made to look backward by a shout from the generous donor, who at once dropped a lighted match into the furrow at the starting-point. Contact with the earth had somewhat dampened the powder, but the startled functionary saw himself pursued by a tall moving pillar of fire and smoke in fierce evolution. He stood for a moment paralyzed and speechless, then he recollected an engagement, and, dropping all, absented himself thence with such surprising celerity that to the eyes of spectators along the route selected he appeared like a long, dim streak of farmer prolonging itself with inconceivable rapidity through seven villages, and audibly refusing to be comforted. "Great Scott! what is that?" cried a surveyor's chainman, shading his eyes and gazing at the fading line of agriculturist which bisected his visible horizon. "That," said the surveyor, carelessly, glancing at the phenomenon and again centring his attention upon his instrument, "is the Meridian of Washington." H HABEAS CORPUS. A writ by which a man may be taken out of jail and asked how he likes it.