Radius Uina Uine NtA Fig.3a.ExPERIMENTAL POSITION OF THE RICHT ARM (superior surface).The pronated forearm was centered between the 2 vertical supports of the wire controller shown in figure 4. The elbow was supported by a soft rubber disc with a central opening just wide enough to receive the medial malleolus of the humerus.The palm of hand was supported on a fat surface of linen twels extended from the head of the metacarpals to the finger tips.Forearm and distal half of upper arm were completely in the air.Inferior aspect of the forearm 5.o cm.above base of the ire controller(fig.4).Horizontal line indicates the plane of passage of the needle;lineI indicates.the level of figure 3c.;line I/indicates the distal plane around the circumference of which temnverature