pheric air, excite our attention; and common tastes
are disagreeably strong.

M. M. Water. Mucilage. Vegetable acids. Scrape the tongue clean. Rub it
with a sage-leaf and vinegar.

5. _Tactus acrior._ The irritative ideas of the nerves of touch excite our
attention: hence our own pressure on the parts, we rest upon, becomes
uneasy with universal soreness.

M. M. Soft feather-bed. Combed wool put under the patients, which rolls
under them, as they turn, and thus prevents their friction against the
sheets. Drawers of soft leather. Plasters of cerate with calamy.

6. _Sensus caloris acrior._ Acuter sense of heat occurs in some diseases,
and that even when the perceptible heat does not appear greater than
natural to the hand of another person. See Class I. 1. 2. See Sect. XIV. 8.
All the above increased actions of our organs of sense separately or
jointly accompany some fevers, and some epileptic diseases; the patients
complaining of the perception of the least light, noises in their ears, bad
smells in the room, and bad tastes in their mouths, with soreness,
numbness, and other uneasy feels, and with disagreeable sensations of
general or partial heat.

7. _Sensus extensionis acrior._ Acuter sense of extension. The sense of
extension was spoken of in Sect. XIV. 7. and XXXII. 4. The defect of
distention in the arterial system is accompanied with faintness; and its
excess with sensations of fulness, or weight, or pressure. This however
refers only to the vascular muscles, which are distended by their
appropriated fluids; but the longitudinal muscles are also affected by
different quantities of extension, and become violently painful by the
excess of it.

These pains of muscles and of membranes are generally divided into acute
and dull pains. The former are generally owing to increase of extension, as
in pricking the skin with a needle; and the latter generally to defect of
extension, as in cold head-aches; but if the edge of a knife, or point of a
pin, be gradually pressed against the fibres of muscles or membranes, there
would seem to be three states or stages of this extension of the fibres;
which have acquired names according to the degree or kind of sensation
produced by the extension of them; these are 1. titillation or tickling. 2.
itching, and the 3. smarting; as described below. See Sect. XIV. 9.

8. _Titillatio._ Tickling is a pleasureable pain of the sense of extension
above mentioned, and therefore excites l