Proceedings of Meeting of the Association of Military Surgeons of the United States. . ve effects with a velocity of 250-300 (distance 700-1100),very pronounced in shots at close range (velocity of GG0 m.). Withreduced velocity we again find simple perforations, or the projectileremains in the bone. (See Figs. 19, 20.) (c) In the extremities we have to distinguish between the dia-physis and the epiphysis. In moist epiphyses at much reducedvelocity the projectile is arrested (see Fig. 21); in somewhat highervelocity (medium distance) simple perforations (see Fig. 22), and inhigh vel
Proceedings of Meeting of the Association of Military Surgeons of the United States. . ve effects with a velocity of 250-300 (distance 700-1100),very pronounced in shots at close range (velocity of GG0 m.). Withreduced velocity we again find simple perforations, or the projectileremains in the bone. (See Figs. 19, 20.) (c) In the extremities we have to distinguish between the dia-physis and the epiphysis. In moist epiphyses at much reducedvelocity the projectile is arrested (see Fig. 21); in somewhat highervelocity (medium distance) simple perforations (see Fig. 22), and inhigh velocity (close range) greater defects, with fracture and dis-ruption (see Figs. 23 and 24). Dry epiphyses, even with highestvelocity, exhibit simple perforation (see Fig. 25). The moist dia-physes show with low velocity (up to 150 i. e., distance of morethan 2000 m.) long fissures. The greater the velocity, i. e., the lessthe distance, the more the effect is concentrated on the point of en-trance, the perforation combining with splintering, the effect in ASSOCIATION OF MILITARY SURGEONS. 387. 388 FOURTH ANNUAL MEETING OF THE medium distances (velocity of 300 m., distance of 701) m.) exhibitinga smaller number of relatively large splinters, while in higher velocity000 m.) we find complete comminution at the point of impact. I Sec-Figs. 25—30.) In dry diaphyses we notice occasionally simple per-forations even with high velocities. (d) As to the effect of the material of the projectile, it is shown,that those which are least subject to deformation cause great ex-plosive effects at high velocity (steel). Of course a number of thepreparations show a very decided explosive effect with soft pro-jectiles, as they are flattened in impact and have, therefore, a greaterdiameter. This is about the substance of Prof. Kochers view, and resultsof his experiments. Experiments of Von Kolek and of J£xpcri? full charge (initial velocity of 040 m.) on distance
Size: 1394px × 1792px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectmilitar, bookyear1894
