or energetic performance of the whole moveable system, as well that of
the heart and arteries, as of digestion and of absorption; since without
the due quantity of pleasurable sensation, flatulency and hypochondriacism
affect the intestines, and a languor seizes the arterial pulsations and
secretions; as occurs in great and continued anxiety of the mind.

2. Besides the febrile motions occasioned by irritation, described in Sect.
XXXII. and termed irritative fever, it frequently happens that pain is
excited by the violence of the fibrous contractions; and other new motions
are then superadded, in consequence of sensation, which we shall term
febris sensitiva, or sensitive fever. It must be observed, that most
irritative fevers begin with a decreased exertion of irritation, owing to
defect of stimulus; but that on the contrary the sensitive fevers, or
inflammations, generally begin with the increased exertion of sensation, as
mentioned in Sect. XXXI. on temperaments: for though the cold fit, which
introduces inflammation, commences with decreased irritation, yet the
inflammation itself commences in the hot fit during the increase of
sensation. Thus a common pustule, or phlegmon, in a part of little
sensibility does not excite an inflammatory fever; but if the stomach,
intestines, or the tender substance beneath the nails, be injured, great
sensation is produced, and the whole system is thrown into that kind of
exertion, which constitutes inflammation.

These sensitive fevers, like the irritative ones, resolve themselves into
those with arterial strength, and those with arterial debility, that is
with excess or defect of sensorial power; these may be termed the febris
sensitiva pulsu forti, sensitive fever with strong pulse, which is the
synocha, or inflammatory fever; and the febris sensitiva pulsu debili,
sensitive fever with weak pulse, which is the typhus gravior, or putrid
fever of some writers.

3. The inflammatory fevers, which are here termed sensitive fevers with
strong pulse, are generally attended with some topical inflammation, as
pleurisy, peripneumony, or rheumatism, which distinguishes them from
irritative fevers with strong pulse. The pulse is strong, quick, and full;
for in this fever there is great irritation, as well as great sensation,
employed in moving the arterial system. The size, or coagulable lymph,
which appears on the blood, is probably an increased secretion from the
inflamed internal lining