THE problem is to explore, identify, and plot charts of cold spots, warmth spots, pain spots, and pressure spots found in the skin.
Outline four blocks, each 10 by 10 millimeters, into 2- millimeter squares with pen and ink on the back of the left hand. Outline a copy of each of these in the notebook and label them Cold, Warmth, Pain, and Pressure respectively.†
Put six of the nails on crushed ice and the other six into water just below the boiling-point.‡ The senseorgans in the skin fatigue very quickly--almost instantaneously-when touched. Therefore, select points for stimulation systematically; follow parallel lines, apply the stimulus with precision and with a constant vertical pressure, remove it within a second, and always trust to first impressions. Make a few preliminary trials for practice on some other skin area.____________________