e production of it,
as in enfeebled drunkards.

Sickness may likewise consist in the retrograde motions of the lymphatics
of the stomach, which regurgitate into it the chyle or lymph, which they
have lately absorbed, as in Class I. 3. 2. 3. It is probable, that these
two kinds of sickness may be different sensations, though they have
acquired but one name; as one of them attends hunger, and the other
repletion; though either of them may possibly be induced by association
with nauseous ideas.

M. M. A blister on the back. An emetic. Opium. Crude mercury. Covering the
head in bed. See Sect. XXV. 16. Class IV. 1. 1. 2. and 3.

5. _Cardialgia._ Heartburn originates from the inactivity of the stomach,
whence the aliment, instead of being subdued by digestion, and converted
into chyle, runs into fermentation, producing acetous acid. Sometimes the
gastric juice itself becomes so acid as to give pain to the upper orifice
of the stomach; these acid contents of the stomach, on falling on a marble
hearth, have been seen to produce an effervescence on it. The pain of heat
at the upper end of the gullet, when any air is brought up from the
fermenting contents of the stomach, is to be ascribed to the sympathy
between these two extremities of the oesophagus rather than to the pungency
of the carbonic gas, or fixed air; as the sensation in swallowing that kind
of air in water is of a different kind. See Class I. 3. 1. 3. and IV. 2. 2.
5.

M. M. This disease arising from indigestion is often very pertinacious, and
afflicting; and attended with emaciation of the body from want of
sufficient chyle. As the saliva swallowed along with our food prevents its
fermentation, as appears by the experiments of Pringle and Macbride, some
find considerable relief by chewing parched wheat, or mastic, or a lock of
wool, frequently in a day, when the pain occurs, and by swallowing the
saliva thus effused; a temporary relief is often obtained from antiacids,
as aerated alcaline water, Seltzer's water, calcareous earths, alcaline
salts made into pills with soap, soap alone, tin, milk, bitters. More
permanent use may be had from such drugs as check fermentation, as acid of
vitriol; but still more permanent relief from such things as invigorate the
digestion, as a blister on the back; a due quantity of vinous spirit and
water taken regularly. Steel. Temperance. A sleep after dinner. A waistcoat
made so tight as slightly to compress the bowels and stomach