and Experiments on Pus. 303 
matters themselves either contained in the circulating blood, 
or on the secreting surface. 
7. That the essential substances of which pus consists, as well 
as some of the adventitious ones (Sect. VII. 1, 2, 3, 6), are sepa- 
rated from the blood by a peculiar organization belonging, or 
attached to the blood-vessels : which organs of separation or 
secretion are not only excited to the action which produces pus 
in diseased states, but they are evidently influenced by the 
states of other distant organs of the animal oeconomy ; hence 
many varieties in the properties of the purulent matter. 
8. That the varieties of purulent matter relate to differences 
of quantity — the proportion of the essential substances (1) — 
and the adventitious parts (2, 3, 4, 5, 6,). The cream-like pus 
consisting of almost purely the opaque oxide and limpid liquid 
(L 1, 2). The curdy containing a large proportion of coagu- 
lated lymph, or broken down solids. The serous abounding in 
limpid fluid. The viscid depending upon the coagulation, and 
perhaps, inspissation, by union of neutral salts with the 
opaque oxide. 
9. That as the essential parts are secreted in 3 limpid state, 
but presently become opaque, owing to a large proportion 
spontaneously coagulating, and thus becoming the opaque 
oxide, mixed with the serous liquid, and innumerable spheri- 
cal particles (Sect. VII. 1. 1, 2, 3), it seems reasonable to infer 
that these matters are the self-coagulated lymph of the blood 
and serum, separated by the secretory organs ; which act 
of secretion determines the subsequent state of aggregation of 
pus, and the globules are at the same time formed analogously 
to their formation by other secretory organs. How far they are 
S s 
MDCCCX* 
