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Conclusion of the Account of an Inquiry into the Human Mind, on

the Principles of Common Sense. Great part of what Dr. Reid has advanced, concerning

the sense of Smelling, (of which we gave a full account in our Review for May) is to easily applied to those of Tasting and Hearing, that he saves his Readers the trouble of a tedious repetition, and leaves the application entirely to their own judgments. He introduces what he says concerning Touch, with observing, that the senses, already considered, are very simple and uniform, each of them exhibiting only one kind of sensation, and thereby indicating only one quality of bodies. By the ear we perceive sounds, and nothing else; by the palate, tastes; and by the nose, odours : these qualities are all likewise of one order, being all secondary qualities : whereas by touch we perceive not one quality only, but many, and those of very different kinds. The chief of them are heat and cold, hardness and softness, roughness and smoothness, figure, solidity, motion, and extension. These our Author considers in order.

As to heat and cold, it will easily be allowed, that they are secondary qualities, of the same order with smell, taste, and sound. And, therefore, what has been said of smell, is easily applicable to them; that is, that the words heat and cold have each of them two significations; they sometimes signify certain sensations of the mind, which can have no existence when they are not felt, nor can exist any where but in a mind, or fentient being; but more frequently they fignify a quality in bodies, which, by the laws of nature, occasions the sensations of heat and cold in us : a quality which, though connected by custom fo closely with the sensation, that we cannot without difficulty VOL. XXXI,

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