334 Dr. Pearson on expectorated Matter. 
this menstruum for a month, in a warm room, during which 
the vessel was often agitated. Three ounces of a black tinc- 
ture were thus procured, which, on distillation to dryness, 
afforded sixty-five grains of soft extract. This extract be- 
came a little moist on exposure to the air, and was then a 
little viscid. It burnt with flame like oil to the state of char- 
coal ; and this again on burning, only left two grains of resi- 
due, which consisted of muriate of soda, with indications of 
alkali, and phosphate of lime. 
The undissolved residue also remained soft, and could 
not be made brittle by evaporation. After inflammation and 
incineration, the usual products were obtained as from matter 
which had not been digested. This menstruum had therefore 
dissolved abundantly the oxide of animal matter, and but a 
small proportion of the saline and earthy parts. 
4. Apparently uniform expectorated matter is not of the 
same consistence through the whole mass ; for a few drops 
of the opaque kind being shaken in half a pint of rectified 
spirit of wine, the whole does not dissolve, but it is broken 
into small curdy particles, which fall as a sediment in a clear 
liquid, seemingly about one-fourth of the original bulk of the 
matter. 
§ IV. With Water . 
1 . None of the kinds of expectorated matter are readily 
diffusible through cold water, except the second and fourth, 
page 31b and 319 ; and by agitating them some fibrous pieces 
are usually detached ; also on inspecting the water after this 
diffusion, it appears full of small masses, or motes. On stand- 
ing, these suspended masses become a sediment ; which is the 
