t6$ 



on EXPECTORATED MATTER. 



tained by the first digestion in the same menstruum, in 

 contniuing a much smaller proportion of potash and muriate 

 of soda, as well as of neutralized ammoiua. 



from the Sd. 6. Tin- extractlike matter, from the third digestion in 

 vinegar (^2 c), differed from the former, in containing a st'rll 

 niiich less quantity of the salts just mentioned. 



Fiomih«suW- 7. The fourth and subsequent digestions (2, d, e) of- 



itqueu . forded extiactlike substances, which contained scarcely any 



thing but a very small proportion of earthy phosphates, 

 and indissoluble vitrified matter, produced by incineration 

 and fusion. It did not appear, that the oxide of animal 

 mutter, dissolved by the distilled vinegar in all the preced- 

 ing digestions successivelj', was of different kinds; but it 

 appeared, that its coagulable property was destroyed by 

 dissolution in this menstruum. Accordingly, there is no 

 reason to believe, that the wiiole of this oxide is not disso- 

 luble in the acid here employed, although the requisite 

 proportion may decrease after each digestion, within cer- 

 tain limits. 



Opaque ropy g_ ^^ few drops of opaque ropy matter being agitated in 



matter treated ■ , r ■ 1 c au 



v.ith Yinegar. halt a pint ot vinegar, a numr>er or hbrous masses appear, 



apparently one fourth or one fifth of the bulk of the mat- 

 ter added ; and these fibrous forms subsist, notwithstand- 

 ing continued agitation, totally disappearing only in con- 

 sequence of long digestion in successive large quantities of 

 'this acid. 



Sect. VI. Some Experiments ivilh different Objects. 

 Potash neu- ^' To produce a synthetic proof, that potash may be 



tr.ilized by ani- neutralized by oxide of animal matter, I triturated teti 

 grains of the exsiccated and coagulated part of expectorated 

 matter, freed from all saline substance, with pure potash gra- 

 dually added, and a little water. Several grains were in thia 

 way united, without any effect being produced by the com- 

 pound on turmeric paper. More alkali was added t''l tlie 

 compound barely manifested the existence of alkali to the 

 test just mentioned. It was then digested in spirit of wine', 

 to which it imparted a deep brown colour, and the tincture 

 being distilled, it alTorded a dry extract, which grew moist 

 on exposure to the air, but scarcely affected turmeric paper. 



0» 



jnal oxide. 



