ON EXPECTORATED MATTER. 0()$ 



2. Four thousand grains of expectorated matter of the Opaque ropy 

 third kind, page 219, sect. II, 1, were added to two pints ^""i^^^kohS" 

 of rectified spirit of. wine. By agitatiop the spirit became 

 at first milky, but presently it grew clear; little curdy masses 

 appearing, which fell to the bottom as a sediment, being 

 in bulk atout one fourth of that of the added expectorated 

 matter. 



After a month's digestion, the filtrated liquid, on evapora- Extract. 

 tion, afforded a dry extractlike residue, weighing sixty grains. 

 It grew moist by exposure to the air, but not when kept 

 in close vessel?. It consisted of the same ingredients, but 

 in very different proportions, as the residue from distilling 

 and evaporating the tincture, page 224, Sect. Ill, 1, the 

 present residue containing a much larger proportion of 

 muriate of soda, and oxide of animal matter. 



Successive, digestions of the same matter afforded less Successivelr 



and less saline residue, but nearly the same proportion of*'"®^***^ '" *^* 

 . - - . , f. 1 • 1 1 same manner. 



oxide OT animal matter tor three times, but then no saline 



matter was afforded, but merely animal matter. The re- 

 sidues of the evaporated tinctures of the subsequent diges- 

 tions did not, like the first, grow moist, but only softer; 

 and the oxide of animal matter from each of them was Animal oxide, 

 no longer coagulable, although afforded by dissolution of 

 coagulated matter. It appeared that the animal oxide waa 

 o'fone kind only, and that the whole of it might be dis- 

 solved in alcohol, and thereby become uncoagulable, and 

 more easily dissoluble in every kind of menstruum. 



n. If a large proportion, namely, two parts of expec- Mixture of 

 torated matter be mixed with two parts of rectified spirit ^'^"''^ ^'^"*' 

 of wine, the matter is in great part, at least, coagulated, 

 but the spirit is rendered milky. The same is true with 

 regard to other menstrua. The reason is obvious. The Coagulation, 

 coagulation is produced by the separation of water from the 

 animal oxide of the expectorated matter, by the attraction 

 of the alcohol, or of acetous acid for the water ; but if there 

 ig not a due proportion of spirit or acid, the oxide of ani- 

 mal matter retains so much of the water, as to render the 

 liquid milky. A person accustomed to these experiments Proportlou of 



TO uy determine pretty exactly, by means of them, the pro- ^*'^''' deters 



^ • \ , .,. mined, 



poriwn 01 water m the ex^>ectorated matter, it being di- 



rectl/ 



