, actuates that
organ with increased energy, and excites by these increased motions the
sensorial power of association; which has also been accumulated during the
inactivity of the heart and arteries; and thus these organs also are now
excited into greater action.

So after the skin has been exposed some hours to greater heat than natural
in the warm room, other parts, as the membranes of the nostrils, or of the
lungs, or of the stomach, are liable to become torpid from direct sympathy
with it, when we come into air of a moderate temperature; whence catarrhs,
coughs, and fevers. But if this torpor be occasioned by defect of stimulus,
as after being exposed to frosty air, the accumulation of sensorial power
is exerted, and a glow of the skin follows, with increased digestion, full
respiration, and more vigorous circulation.

11. It may be asked, Why is there a great and constant accumulation of the
sensorial power of association, owing to the torpor of the stomach and
heart and arteries, in continued fever with weak pulse; which is exerted on
the cutaneous and pulmonary capillaries, so as to excite them into
increased action for many weeks, and yet no such exuberance of sensorial
power produces fever in winter-sleeping animals, or in chlorosis, or
apepsia, or hysteria?

In winter-sleeping animals I suppose the whole nervous system is torpid, or
paralysed, as in the sleep of frozen people; and that the stomach is torpid
in consequence of the inactivity or quiescence of the brain; and that all
other parts of the body, and the cutaneous capillaries with the rest,
labour under a similar torpor.

In chlorosis, I imagine, the actions of the heart and arteries, as well as
those of the cutaneous and pulmonary capillaries, suffer along with those
of the stomach from the deficient stimulus of the pale blood; and that
though the liver is probably the seat of the original torpor in this
disease, with which all other parts sympathize from defect of the
excitation of the sensorial power of association; yet as this torpor occurs
in so small a degree as not to excite a shuddering or cold fit, no
observable consequences are in general occasioned by the consequent
accumulation of sensorial power. Sometimes indeed in chlorosis there does
occur a frequent pulse and hot skin; in which circumstances I suppose the
heart and arteries are become in some degree torpid by direct sympathy with
the torpid liver; and that hence not only the pulse