Dr. Pearson on expectorated Matter. 34, i 
in the little liquid which came over, nor did this dry substance 
indicate any acidity to the usual re-agents — neither on expo- 
sure to the air did it, as before the addition of acid, grow moist. 
Phosphoric acid was further added till it became sensible to 
the test of turnsole : but neither by elutriation nor distillation 
could any acid be obtained, except a small portion of the 
phosphoric acid by elutriation, the rest having united to the 
potash. 
3. To furnish an estimate of the proportion of ammonia, I 
subjected to distillation, a mixture of a pint of expectorated 
matter of the fifth kind, page 321, with three ounces of well 
burnt lime, but I could not reckon the ammonia in the dis- 
tilled liquid at more than two cubic inches, or less than half a 
grain in weight. 
§ VII. Conclusions. 
1. From the preceding experiments and observations, and 
from others which I might have related, it does not appear 
that the various kinds of expectorated matter, page 314,, differ 
in the ingredients of their composition, but merely in the pro- 
portion of them to one another. 
2. It has been shown that expectorated matter consists of 
coagulable, or, as it is also now frequently termed albuminous 
animal subtance, and of water impregnated with several saline 
and earthy bodies— that the largest proportion of the animal 
substance, which may justly be called an oxide, amounts to 
one twelfth, and in some very rare cases to one tenth of the 
expectorated matter, reduced to a brittle state by evaporation; 
and that the smallest proportion of this oxide, in rare instances, 
amounts to one forty -fifth of the expectorated matter ; but 
that the usual proportions of it vary between one twentieth 
and one sixteenth of this coagulable oxide to the evaporable 
mdcccix. Y y 
