DISEASES OF THE HEART IN DOMESTIC ANIMALS. 
451 
That which does not reabsorb is organized into a secondary form 
of exudation as purulent, tuberculous, and secondary hemor¬ 
rhagic exudation. Soon after the fibrinous exudation organizes, 
distinct cells are to be found, which adhere to one another and 
form the plastic exudation. Such fibres accumulate in various 
quantities and form pseudo-membranes and swardy exudation on 
the heart and peritonieal membrane. 
In such case, the pericardium is always thickened, turbid and 
tender, covered in spots with rugged, wart-like, navicular sec¬ 
ondary excrescences of cellular tissue. These cause chord-like, 
resembling thick snow-flakes, or rugged, partial protuberances 
projecting into the cavity of the pericardium. Such swardy cov¬ 
erings are traversed with vessels which generally have an ex¬ 
tended course. According to their calibre these vessels arise 
above the capillary veins. After the resorption of the liquid 
exudation, the above mentioned snow-flake-like formations remain 
in greater or less dimension. 
In fibrous exudation a calcification or cretifaction takes place 
after a deposit of chloride of lime, which is erroneously regarded 
as ossification, no trace of bony cells being found here. 
II.— Albuminous Exudation. 
This is often and mostly an attendant of fibrinous exudation, 
though sometimes it occurs independently. It consists chiefly 
of albumen and serum of a gelatinous, often oily consistence, of 
a uniform yellow color and very glossy. Its quantity varies from 
a few to hundreds of grammes. The albuminous exudation has 
not the organizable quality of the fibrinous. Cells are also 
formed in it, but upon their appearance the whole mass assumes 
a purulent aspect. It rarely maintains organizable power, and if 
it be not previously resolved, it changes to a sanious and purulent 
substance. 
III.— Serous Exudation. 
Serous exudation is an accumulation of serum in the cavity 
of the pericardium, and is only then to be regarded as proceeding 
from pericarditis, when it takes place at the same time with 
fibrinous products. Serous exudation is very rarely found in the 
