Corrections for depth immersion were applied, and the unimmersed portions of the needles were coated with Ddw-Corning RTV silicone to insulate against heat conduction. The thermistors' depth of penetration was calculated from radio-graphs. The positions of the needles were as follows: Experiment 1: Halfway between the wrist crest and the most prominent point of the metacarpopha-langeal joint of the thumb and 1.9 cm from the edge of the metacarpal bone. The depth of the probe under the skin surface was 0.43 cm; 1.35 cm of the needle was inserted