testines.

Hence weak people should use the cold air of winter as a cold bath; that
is, they should stay in it but a short time at once, but should immerse
themselves in it many times a day.

5. _Catarrhus a frigore cutaneo._ Catarrh from cold skin. This has been
already explained in Class I. 1. 2. 7. and is further described in Sect.
XXXV. 1. 3. In this disease the vessels of the membrane, which lines the
nostrils, are excited into greater action; when those of the skin, with
which they are associated, are excited into less action by the deficiency
of external heat, by reverse sympathy; and though the pain of cold attends
the torpor of the primary link of this association, yet the increased
motions of the membrane of the nostrils are associated with those of the
cutaneous vessels, and not with the pain of them, because no inflammation
follows.

6. _Absorptio cellularis aucta vomitu._ In the act of vomiting the
irritative motions of the stomach are inverted, and of the absorbents,
which open their mouths into it; while the cutaneous, cellular, and
pulmonary absorbents are induced, by reverse sympathy with them, to act
with greater energy. This is seen in cases of anasarca, when long sickness
and vomiting are caused by squills, or antimonial salts, or most of all by
the decoction of digitalis purpurea, foxglove; and Mr. J. Hunter mentions a
case, in which a large bubo, which was just ready to break, was absorbed in
a few days by sickness at sea. Treatise on the Blood, p. 501, which is thus
accounted for; less sensorial power is expended during sickness by the
decreased action of the fibres of the stomach, and of its absorbents; as
shewn in Sect. XXXV. 1. 3. whence an accumulation of it is produced, and
there is in consequence a greater quantity of sensorial power for the
exertion of those motions, which are associated with the absorbents of the
stomach by reverse sympathy.

The reverse sympathy between the lacteal and lymphatic branches of the
absorbent system have been produced by the one branch being less excited to
act, when the other supplies sufficient fluid or nutriment to the
sanguiferous vessels. Thus when the stomach is full, and the supply of
chyle and mucus and water is in sufficient quantity; the pulmonary,
cellular, and cutaneous lymphatics are not excited into action; whence the
urine is pale, and the skin moist, from the defect of absorption on those
surfaces.

7. _Syngultus nephriticus._ When a stone