A sufficient number of charges having been provided, the corporal brought his men to the reduct, whence the gun’s mouth projected over a sloping embrasure. The two officers, in cocked hats and full staff uniform, attended to take charge of the proceedings. The gun was maneuvered in strict accordance with the rules of “The Artilleryman’s Manual,” and the firing commenced. Not unmindful of the warning he had received, the corporal was most careful between each discharge to see that every vestige of fire was extinguished, so as to prevent an untimely explosion while the men were reloading; and accidents, such as so frequently mar public rejoicings, were all happily avoided. Much to the chagrin of both Colonel Murphy and Major Oliphant, the effect of the salute fell altogether short of their anticipations. The weight of the atmosphere was so reduced that there was comparatively little resistance to the explosive force of the gases, liberated at the cannon’s mouth, and there was consequently none of the reverberation, like rolling thunder, that ordinarily follows the discharge of heavy artillery. Twenty times had the gun been fired, and it was on the point of being loaded for the last time, when the colonel laid his hand upon the arm of the man who had the ramrod. “Stop!” he said; “we will have a ball this time. Let us put the range of the piece to the test.” “A good idea!” replied the major. “Corporal, you hear the orders.” In quick time an artillery-wagon was on the spot, and the men lifted out a full-sized shot, weighing 200 lbs., which, under ordinary circumstances, the cannon would carry about four miles. It was proposed, by means of telescopes, to note the place where the ball first touched the water, and thus to obtain an approximation sufficiently accurate as to the true range. Having been duly charged with powder and ball, the gun was raised to an angle of something under 45 degrees, so as to allow proper development to the curve that the projectile would make, and, at a signal from the major, the light was applied to the priming. “Heavens!” “By all that’s good!” exclaimed both officers in one breath, as, standing open-mouthed, they hardly knew whether they were to believe the evidence of their own senses. “Is it possible?” The diminution of the force of attraction at the earth’s surface was so considerable that the ball had sped beyond the horizon. “Incredible!” ejaculated the colonel. “Incredible!” echoed the major. “Six miles at least!” observed the one. “Ay, more than that!” replied the other.