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14
LIFE IN MOTION
limb, and we can connect the ends of the copper wire with an electric battery. If I take into my hands the ends of the wires coming from the battery, I feel nothing, so that any force that may be coming from the battery is not
Fig. 4.—Electro-magnet supporting a weight, a, stand; b, galvanic element; c, key; d, electro-magnet; e, keeper ; f, weight.
affecting my skin so as to cause any kind of sensation; but if I touch the tip of my tongue with the wires, I have a peculiar sensation of taste. The tongue tells me that something is affecting me, although the hands are apparently
