SECT. IV. PHYSIOLOGY. 27 
during the remainder of the voyage, which lasted 
two months. 
xuul. The fever which arises from scarcity of 
water, follows the general course of Cullen’s syno- 
chus, except, that so far as I have been able to 
ascertain, it never commences with cold shiverings 
or vomiting. 
xii. In tropical climates, when the skin is 
dry, and the temperature of the body at 100°, it 
is astonishing with what rapidity profuse per- 
spiration follows a draught of water. 
xuiv. The skin on the paralytic side of a 
person afflicted with hemiplegia, is also paralyzed, 
and consequently opposes no obstacle to the egress 
of the sweat ; but the same deficiency of vital force 
which diminishes the expansion of the skin, 
reduces also the expansion of the exhalants, and 
prevents the fluids from reaching the skin in usual 
abundance. There are, however, some cases of 
hemiplegia, where the sweating is profuse on the 
paralyzed side, while the other remains quite 
dry. Bichat mentions one case of this kind, and 
Dr. Sillar recently had the goodness to show me 
a patient affected in a similar manner. 
xiv. The pores of the skin permit only the 
most aqueous parts of the fluids to pass through 
them, while it is in a healthy state. But in 
continued -fever, when the skin loses its ex- 
pansibility so far as to permit the exit of a 
