&62 



OW EXPECTORATED MATTER. 



P.ra^li and 

 muriate of so- 

 da. 



Component 

 parN of the 

 extract. 



Matter not so 



Iiible in aico- crucible. 



in subsequent processes I faiied in prodaciug the same 

 apple-snaelling- linuid. Hence 1 considered, that the sup- 

 posed acid, which liad some of the properties of the mahc, 

 only occurred occasionally ; or that 1 had been deceived, 

 and that 1 had procured nothing more than a little of the 

 acid employed for the decomposition, disguised by mix- 

 ture with the subject of the experiments. The fawn- 

 coloured precipitate was, no doubt, chiefly muriate of lead. 

 Still the experiments fully demonstrated the presence of 

 potash neutralized, either by an acid destructible by fire 

 and dissoluble in alcohol, but hitherto not dinuuited from 

 animal oxide, or that an oxide of animal matter alone neu- 

 tralizes the potash, as will be manifested by the evidence 

 of experiments to be related. 



. {e). Forty-tiv-e grains of the residue (c) which had been 

 dissolved in alcohol, being burned ia a platina crucible, 

 yielded chiefly potash, and half its quantity of inuriate of 

 soda. 



(y). Twenty-five grains of the residue (c) were boiled 

 with successive portions of nitric acid, till the oxide of 

 animal matter was decompounded, and carried off in the 

 state of gasses ; and then deflagration took place, leaving 

 hubcarbonate of potash with muriate of soda and charcoal. 



According to a computation, the 140 grains of resiulike 

 extract (c, d) consisted of twenty-eight grains of potash, 

 and eighteen grains of muriate of soda, with an inappreci- 

 able quantity of ammonia, and perhaps phosphoric acid, 

 beside the oxide of animal matter, and possibly an acid of 

 an unknown kind. 



(/). The undissolved matter {h) was burned in a platina 

 It afi^orded a residue, which 1 could not render 

 fluid by fire, but only of the consistence of paste? On 

 cooling, it was a brittle gray mass weighing fifty-six grains, 

 somewhat s-alt aud gritty to the taste. It consisted of mu- 

 riate of soda, and phosphate of lime, about twenty-three 

 grains of each, — of potash four grains — of fused mutter, 

 wliich by long boiling in muriatic acid yielded phosphate 

 of lime, muriate of lime, aud utterly indissoluble vitri- 

 fied matter with traces of magnesia, oxide of iron, ar,d a 

 •sulphate. 



2. Four 



