. Confederate States medical & surgical journal . 40 a. xd the whole ball, -in point of metal, and the point of gravitation (p\ lying inthe axis y x results yp : xp:: : ; its posi-tion, in other words, is in the axis nearer to the point ol thecone than to its base. The motion of a eonk-ul ball, 3trictly * Aaalogous to the peculiar rotation of the mechanical para-dox ; the Australian vomera also owes its peculiar flight to simi-lar circumstances. 158 CONFEDEKATE STATES MEDICAL AND SURGICAL JOURNAL. speaking, dips forward, whereby its gravitation would be ma-t
. Confederate States medical & surgical journal . 40 a. xd the whole ball, -in point of metal, and the point of gravitation (p\ lying inthe axis y x results yp : xp:: : ; its posi-tion, in other words, is in the axis nearer to the point ol thecone than to its base. The motion of a eonk-ul ball, 3trictly * Aaalogous to the peculiar rotation of the mechanical para-dox ; the Australian vomera also owes its peculiar flight to simi-lar circumstances. 158 CONFEDEKATE STATES MEDICAL AND SURGICAL JOURNAL. speaking, dips forward, whereby its gravitation would be ma-terially increased did not its rotation in the plane of .flight*counteract the same. An increase of forward motion mustalso be expected from the vacuum around the ball during itsflight, and the consequent collapse and forcible entrance ofair into the hollow cone, a fact to which we will have occa-sion to refer hereafter. Hence, while the initial velocity ofa conical ball is less than that of a spherical, yet its abso-lute speed is much Explanation op Diagram.—x y, line of flight; A, first position of ball;B, portion of bone struck at angle of 22°; a b, axis of bone at point ofcone, c; e c, o c, conical surface of ball, are of 60°; m r=c m-10; p »,8 q, arcs of C0°; A, second position of ball turned at angle of 15°; X Y,second line of flight: c, second position of point of cone after deflection;cf, its tangent at c for second position of ball; c g, direction of power ofresistance; c h, new deflection; fi = cf-10; p q, p q, bases of cones. Let A, an elongated ball, strike the skull B under an angleof 22°, and supposing the conical surfaces ec and oc to formarcs of 80°; let the velocity of the ball be sufficient to pene-trate (c) a given depth of the bone, then ah, the axis of thebone at c, will resist the further progress of the cone, formingwith xy, line of flight, the elements for the parallelogram ofopposing powers; and if cm, or the momentum of the ball,be eq
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Keywords: ., bookcentury1800, bookdecade1860, bookidconfederates, bookyear1864
