breathed oxygen gas undiluted, in the
quantity of six or eight gallons a day for three or four weeks without any
effect, and sunk at length from general debility.

In this instructive case I imagine the pressure or stimulus of one part of
the nerve within the chest caused the other part, which serves the arm, to
become torpid, and consequently cold by sympathy; and that the inflammation
was the consequence of the previous torpor and coldness of the arm, in the
same manner as the swelling and inflammation of the cheek in tooth-ach, in
the first species of this genus; and that many rheumatic inflammations are
thus produced by sympathy with some distant part.

14. _Diarrhoea a dentitione._ The diarrhoea, which frequently attends
dentition, is the consequence of indigestion; the aliment acquires chemical
changes, and by its acidity acts as a cathartic; and changes the yellow
bile into green, which is evacuated along with indigested parts of the
coagulum of milk. The indigestion is owing to the torpor of the stomach and
intestines caused by their association with the membranes of the gums,
which are now stimulated into great exertion with pain; both which
contribute to expend the general quantity of sensorial power, which belongs
to this membranous association; and thus the stomach and intestines act
with less than their natural energy. This is generally esteemed a
favourable symptom in difficult dentition, as the pain of the alveolar
membranes exhausts the sensorial power without producing convulsions for
its relief. See Class I. 1. 4. 5. And the diarrhoea ceases, as the tooth
advances.

* * * * *

ORDO II.

_Decreased Associate Motions._

GENUS III.

_Catenated with Voluntary Motions._

SPECIES.

1. _Titubatio linguae._ Impediment of speech is owing to the associations
of the motions of the organs of speech being interrupted or dissevered by
ill-employed sensation or sensitive motions, as by awe, bashfulness,
ambition of shining, or fear of not succeeding, and the person uses
voluntary efforts in vain to regain the broken associations, as explained
in Sect. XVII. 1. 10. and XVII. 2. 10.

The broken association is generally between the first consonant and the
succeeding vowel; as in endeavouring to pronounce the word parable, the p
is voluntarily repeated again and again, but the remainder of the word does
not follow, because the association between it and the next vowel is
dissev