Analysis of the Phenomena of the Human Mind

by James Mill

In fact, every sensation which could not properly be assigned to any other of the senses, has been allotted to the touch. The sensations classed, or rather jumbled together, under this head, form a kind of miscellany, wherein are included feelings totally unlike.

The ORGAN of TOUCH is diffused over the whole surface of the body, and reaches a certain way into the alimentary canal. Of food, as merely tangible, there is seldom a distinct sensation in the stomach, or any lower part of the channel, except towards the extremity. The stomach, however, is sensible to heat, and so is the whole of the alimentary canal, as far at least as any experiment is capable of being made. It may, indeed, be inferred, that we are insensible to the feelings of touch, throughout the intestinal canal, only from the habit of not attending to them.[9]

[⁹] The surface of the sense of Touch properly so called is the skin, or common integument of the body, the interior of the mouth and the tongue, and the interior of the nose. There are common anatomical peculiarities in these organs; which distinguish them from the alimentary canal and all the other interior surfaces of the body. Moreover, although, in the alimentary canal, there is solid or liquid contact with a sensitive surface, the mode of exciting the sensitive nerves, and the resulting sensibility, are peculiar and distinct. The mode of action in touch is mechanical contact or pressure, mainly of solid and resisting bodies; in digestion, the nerves are affected through chemical and other processes—solution, absorption, assimilation, &c. In touch, there is the peculiar feeling known as hard contact, together with the varying discrimination of plurality of points. In digestion, when healthy, the feeling of contact is entirely absent.—B.

29 We have next to consider the OBJECT of TOUCH. Whatever yields resistance, and whatever is extended, figured, hot, or cold, we set down, in ordinary language, as objects of touch.

I shall show, when the necessary explanations have been afforded, that the idea of resistance, the idea of extension, and the idea of figure, include more than can be referred to the touch, as the ideas of visible figure and magnitude include more than can be referred to the eye. It has been long known, that many of the things, which the feeling by the eye seems to include, it only suggests. It is not less important to know, that the same is the case with the tactual feeling; that this also suggests various particulars which it has been supposed to comprehend.

In the present stage of our investigation, it is not expedient to push very far the inquiry, what it is, or is not, proper, to class as sensations of touch, because that can be settled with much greater advantage hereafter.

The sensations of heat and cold offer this advantage,—that being often felt without the accompaniment of 30 any thing visible or extended, which can be called an object, they can be more distinctly conceived as simple feelings, than most of our other sensations.[10] They are feelings very different from the ordinary sensations of touch; and possibly the only reason for classing them with those sensations was, that the organ of them, like that of touch, is diffused over the whole body. We know not that the nerves appropriated to the sensations of heat and cold are the same with those which have the sensation of touch. If they be the same, they must at any rate be affected in a very different manner.

[¹⁰] The sensations of heat and cold are, of all sensations, the most subjective. The reason is that they are least connected with definite muscular energies. The rise and fall of the temperature of the surrounding air may induce sensations wholly independent of our own movements; and to whatever extent such independence exists, there is a corresponding absence of objectivity. This independence, however, is still only partial, even in the case of heat and cold; in a great number, perhaps a majority, of instances, they depend upon our movements; as in changing our position with reference to a fire, in our clothing, and so on. It is the possibility of conceiving them in the pure subject character, and apart from object relations, that constitutes them simple feelings, in the acceptation of the text. Although not in an equal degree, the same is true of sensations of hearing, on which the author made a similar [remark].—B.

To whatever class we may refer the sensations of heat and cold, in their moderate degrees, it seems that good reasons may be given for not ranking them with the sensations of touch, when they rise to the degree of pain. All those acute feelings which attend the disorganization, or tendency toward disorganization, 31 of the several parts of our frame, seem entirely distinct from the feelings of touch. Even in the case of cutting, or laceration, the mere touch of the knife or other instrument is one feeling, the pain of the cut, or laceration, another feeling, as much as, in the mouth, the touch of the sugar is one feeling, the sweetness of it another.

As we shall offer reasons [hereafter] to show, that the feelings of resistance, extension, and figure, are not feelings of touch, we should endeavour to conceive what feeling it is which remains when those feelings are taken away.