s
appears by the weakness of the pulse during the exhibition of an emetic;
and that the absorbents of the stomach are associated with the cellular and
cutaneous absorbents by reverse sympathy, as is shewn by the great
absorption of the mucus of the cells in anasarca during sickness; at the
same time that the absorbents of the stomach invert their actions, and pour
the mucus and water thus absorbed into that viscus.

In cold paroxysms of fever the stomach partakes of the general torpor, and
vomiting is induced by its debility, either by its association with the
torpid capillaries, or other torpid parts, or by its own torpor commencing
first, and causing the cold fit. The disordered motions of the stomach
frequently seem to be the cause or primary seat of fever, as where
contagious miasmata are swallowed with the saliva, and where fever is
produced by sea-sickness, which I once saw. Nevertheless a disorder of the
stomach does not always induce fever, as in that case it should constantly
attend indigestion, and vertigo, and sea-sickness; but is itself frequently
induced by association with the disordered movements of other parts of the
system, as when it arises from gravel in the ureter, or from a percussion
on the head.

The connexion of the motions of the stomach with irritative ideas, or
motions of the organs of sense, in vertigo, is shewn in Sect. XX. and thus
it appears, that many circles of association are either directly or
reversely associated, or catenated, with this viscus; which will much
contribute to unfold some of the symptoms of fever.

K. _Tertian Associations._

The third link of associate trains of motion is sometimes actuated by
reverse sympathy, with the second link, and that by reverse sympathy with
the first link; so that the first and third link may act by direct
sympathy, and the intermediate one by reverse sympathy. Of this instances
are given in the syngultus nephriticus, Class IV. 1. 1. 7. and IV. 2. 1. At
other times the tertian or quartan links of associate motions are actuated
by direct sympathy; and that sometimes forwards and sometimes backwards in
respect to the usual order of those trains of associate motions, as in
Class IV. 1. 2. 1.

SPECIES.

1. _Rubor vultus prandorum._ Flushing of the face after dinner is explained
in Sect. XXXV. 1. In the beginning of intoxication the whole skin becomes
florid from the association of the actions of the cutaneous arteries with
those of the stom