ends on the difficulty of the passage of the blood through the pulmonary
or aortal capillaries, as in the cold fits of intermittents, and in some
palpitations of the heart, and in some kinds of haemoptoe? in these cases
the increased resistance prevents the heart from emptying itself, and in
consequence a new diastole sooner occurs, and thus the number of pulsations
becomes greater in a given time.

5. In respect to the sympathies of action, which produce or constitute
fever with debility, the system may be divided into certain provinces,
which are assentient or opposite to each other. First, the lacteals or
absorbent vessels of the stomach, and upper part of the intestines;
secondly, the lymphatics or all the other branches of the absorbent
vessels, which arise from the skin, mucous membranes, cellular membranes,
and the various glands. These two divisions act by reverse sympathy with
each other in the hot fits of fever with debility, though by direct
sympathy in the cold ones. The third division consists of the secerning
vessels of the stomach and upper intestines; and the fourth of the
secerning vessels of all the other parts of the body, as the capillary
glands of the skin, lungs, and cellular membrane, and the various other
glands belonging to the sanguiferous system. Many of these frequently, but
the capillaries always, act by reverse sympathy with those of the third
division above mentioned in the hot fits of fever with debility, though by
direct sympathy with them in the cold fits. Fifthly, the muscular fibres of
the stomach, and upper intestines; and sixthly, the muscular fibres of the
heart and arteries. The actions of these two last divisions of moving
fibres act by direct sympathy with each other, both in the cold and hot
fits of fevers with debility.

The efficient cause of those apparent sympathies in fevers with weak pulse
may be thus understood. In the cold paroxysm of fever with weak pulse the
part first affected I believe to be the stomach, and that it has become
torpid by previous violent exertion, as by swallowing contagious matter
mixed with saliva, and not by defect of stimulus, as from cold or hunger.
The actions of this important organ, which sympathizes with almost every
part of the body, being thus much diminished or nearly destroyed, the
sensorial power of association is not excited; which in health contributes
to move the heart and arteries, and all the rest of the system; whence an
universal