Dr. Pearson on expectorated Matter. 315 
VI. Pus from the vomicae of tubercles. 
VII. Pus from vomicae by simple inflammation of the lungs, 
and without tubercles. 
Other kinds of matter are occasionally coughed up, such 
as calculi, — masses of self-coagulated lymph — serous fluid- 
blood itself, — and perhaps the vascular substance of the lungs ; 
but I do not write on these matters, because they either do not 
belong to any particular recognized disease ; or they are rare 
occurrences in some well known disease, and are too obvious 
to require description. 
§ I. Sensible , or obvious Properties. 
1. The jelly-like matter, as already said, is excreted in the 
best health, as well as sometimes in disease. It is mostly 
coughed, or hawked up, in a morning soon after a night’s 
repose, during which it seems to accumulate. A few masses, 
or nodules, then appear of the consistence of jelly, and 
of the size of a pea to a hazle nut. It is also at any time 
liable to be excreted, in consequence of various extraneous 
matters irritating the fauces, to the amount of a few nodules* 
It is of a grayish colour or inclining to blue, with black specks ; 
and it is rarely whitish in nodules. The consistence is that of 
jelly, but of much greater tenacity. It has a barely perceiv- 
able taste of common salt, or muriate of soda. It commonly 
floats on water, but by agitation to disengage air bubbles, it 
sinks. It has no smell. To the naked eye, or assisted by 
a single magnifier, this matter seldom appears uniform, but 
consists of a mixture of opaque and transparent masses of 
irregular figures. With the compound microscope, spherical 
