Modern surgery, general and operative . velocity, and carried long dis-tances. The old bullet was liable to lodge, was often deflected in the tissues,was flattened out on meeting with resistant structures, such as bone or cartil-age, and, after flattening, became larger, tearing and lacerating the soft partsand comminuting the bone. The modern projectile is likely to penetrate, israrely deflected, and is so hard that its shape is often but little altered onmeeting with resistant structures. Hence, it was thought that the new bulletwoidd prove more humane than the old projectile and inflict wou
Modern surgery, general and operative . velocity, and carried long dis-tances. The old bullet was liable to lodge, was often deflected in the tissues,was flattened out on meeting with resistant structures, such as bone or cartil-age, and, after flattening, became larger, tearing and lacerating the soft partsand comminuting the bone. The modern projectile is likely to penetrate, israrely deflected, and is so hard that its shape is often but little altered onmeeting with resistant structures. Hence, it was thought that the new bulletwoidd prove more humane than the old projectile and inflict wounds that wouldbe more easily treated, because the bullet would be unapt to lodge and ex-tensive damage would seldom be inflicted. This view has proved, to a greatextent, correct. With the modern rifle of small caliber and the hard projectile propelledby smokeless powder the range has been notably increased, the trajectoryof the bullets flight has been greatly lowered, and the danger-zone to an enemyhas been correspondingly Fig. 125.—I, Krag-Jorgensen; 2, new Springfield. Mechanics of Projectiles.—If a moving bullet were acted upon by no forcebut propulsion, it would continue to move in the direction that it was piirsuingwhen it left the muzzle of the gun and its course would be a straight line,but it is acted upon by other forces. Even in a vacuum its course would notbe a straight, but a curved line, because gravitation would draw it toward theearth. Under ordinary circumstances the air also resists its forward progress. A moving bullet is urged onward by the force of the exploding onward movement is called the motion of translation. The rate of for-ward movement is the velocity, and this is expressed in feet per second. Air-resistance causes the velocity to lessen rapidly, and the farther away from thegun the projectile is, the greater is its loss of velocity. For instance, on leavingthe muzzle of the Lee-Enfield rifle a buQet has a velocity of 206
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectsurgery
