338 Dr. Pearson on expectorated Matter. 
days partially deliquesced, affording no signs of alkalescency, 
but having a peculiar salt taste. 
(a) . A little of this deliquescing part being boiled to dry- 
ness, with a large proportion of nitrous acid, on beginning to 
be ignited, it deflagrated, leaving a blackish saline residue ; 
which soon deliquesced, and being lixiviated, it precipitated 
supertartrate of potash with tartaric acid, and gave a reddish 
precipitate with nitro-muriate of platina. The residue also 
contained lime, for the dissolution in acetous acid afforded 
oxalate of lime, on the addition of oxalate of ammonia. 
( b ) . This extract-like matter (2 a), by digestion in rectified 
spirit of wine, gave a blackish tincture, which being decanted 
and evaporated, left a residue. This became quite liquid after 
twenty-four hours exposure to the air. It consisted chiefly of 
acetite of potash, with an inappreciable portion of muriate of 
soda, and ammonia neutralized, probably, by phosphoric acid; 
besides uncoagulable and ungelatinizable oxide of animal sub- 
stance. 
(c) . The undissolved matter by spirit of wine, just spoken 
of (6), after expression, being desiccated, it remained in a 
solid state after exposure to the air, only growing a little soft 
in four weeks time. By combustion, it afforded a difficultly 
fusible ash, which after fusion w T as found to consist chiefly of 
phosphate of lime, muriate of soda, with a little potash ; a 
sulphate, traces of iron, and vitrified matter, which probably 
contained silica united to the other substances manifested in 
this fused mass. 
5. The extract-like matter, by acetous acid on the second 
digestion (2 b), grew soft, but did not deliquesce on exposure 
to the air. It w'as found to differ from the matter obtained 
