Hold both hands in water which causes the thermometer to rise to ninety
degrees, and when the liquid has become still, you will be insensible
of the heat, and that the hand is touching any thing. Then remove one
hand to water that causes the thermometer to rise to 200 degrees, and
the other in water at thirty-two degrees. After holding the hands
thus for some time, remove them, and again immerse them in the water
at ninety degrees; when you will feel _warmth_ in one hand and _cold_
in the other. To the hand which had been immersed in the water at
thirty-two degrees, the water at ninety degrees will feel hot; and to
the hand which had been immersed in the water at 200 degrees, the water
at ninety degrees will feel cold. If, therefore, the touch in this case
be trusted, the same water will be judged to be hot and cold at the
_same_ time.