* With new sensation thrill'd. l. 365. There is probably a system of nerves in animal bodies for the purpose of perceiving heat; since the degree of this fluid is so necessary to health that we become presently injured either by its access or defect; and because almost every part of our bodies is supplied with branches from different pairs of nerves, which would not seem necessary for their motion alone. It is therefore probable, that our sen∣sation of electricity is only of its violence in passing through our system by its suddenly distending the muscles, like any other mechanical violence; and that it is general pain alone that we feel, and not any sensation analogous to the specific quality of the object. Nature may seem to have been niggardly to mankind in bestowing upon them so few senses; since a sense to have perceived electricity, and another to have perceived mag∣netism might have been of great service to them, many ages before these fluids were dis∣covered by accidental experiment, but it is possible an increased number of senses might have incommoded us by adding to the size of our bodies.
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