We may be satisfied, from the observations which follow, that there is no sense besides the five—besides, that is, Sight, Hearing, Smell, Taste, and Touch; for if Touch be the sense for every impression of which we are sensible, and if we have this sense, then, as all the conditions of whatever is tangible, in so far as tangible, are made perceptible to us by the Touch, it follows that, if any sensation be wanting, some sentient organ must be wanting to us also. Now, all the bodies which are perceived by touching are made sensible to us by the Touch which has been allotted to us; and all those which are perceived, not by touching but, through media, are made sensible to us by simple bodies—that is, by air and water. We are so constituted, in fact, that, if several objects, differing generically from one another, could be perceived through one medium, an individual, having a sentient organ such as that medium, would,
