270 ofo flrtt. 



for merely by the prefence of thefe principles : this is more 

 particularly to be obferved on fubmitting it to the action of 

 fire and of acid s. 

 Deftruftive dif- Bile, if diftilled to drynefs, leaves a refiduum equal to |-th 

 S^dJ^ln ° fit8 ori S inal w^g 1 ^; ^m 100 parts of which calcined is 

 which is only obtained a carbonaceous matter, comprifing feveral kinds of 

 foda fif and° f thi s ^ ™ Inarine faIt » phofphate of foda, fulphate of foda, 

 cannot faponify phofphate of lime, oxide of iron, and four parts of foda. Bile 

 the oil. therefore contains no more than f£$ parts of its weight of foda. 



So final 1 a portion of alkali would not be fufficient of itfelf 

 to dilfolve that quantity of oil which is known to exift in bile: 

 a fair preemption may therefore be entertained that this li- 

 quor contains fome other property to fupply the abfence of al- 

 kali. This conjecture increafes to ftrong probability, if not 

 to abfolute certainty, in attending to the action of acids on 

 bile. 

 Acid feparajtes If a kw drops of acid be mixed with bile, a liquor of a 

 rYomtile^t'hT reddiftl tInt is opined, which ftains paper of a bright 

 clear fluid is yellow. In this experiment little or no precipitation is per- 

 JjJJJj ' and af ~ ceived ; but on the addition of more acid, it takes place abun- 

 arefiduum. dantly : the matter depoftted con lifts of albumen joined with 

 a very fmall portion of oil, not at all correfpondent to the 

 quantity of thefe fubftances to be found united in pure bile. The 

 liquor remaining after filtration is of an extremely bitter tafte, 

 and leaves on evaporation a refiduum equal to what is ob- 

 tained from a like quantity of bile in its original (late. 

 The oil with an On diflfolving the oil, which had been previoufly obtained 



alkali and aibu- f rom bile, in alkali, and adding to the lev produced, a portion 



?aea is not bile. - - ° * *' , r r „ 



oi albumen, a combination took place which was decompofed 



by the mod feeble acids, and from which vinegar precipitated 



all" the oil. This combination, therefore, was not bile; con- 



fequently bile confifts not merely of albumen, oil, and foda; 



and this is the reafon why foluble falts, bariles, ftrontian, Time, 



and feveral metallic difp>lvents, make no impreffion upon bile. 



Bile contains a No longer doubting that there exifted in bile a matter peculiar 



peculiar matter, to itfelf. I endeavoured to feparate it ; and after a few trials, 



I fucceedcd, by me^ns of a combination of acetous acid with 



lead. 



Acetite of lead O:. pouring into bile acetile vyith a flight excefc of oxide of 



F d Ci ?b ^Vh lead ^ llmt * S ' aCf ite & common lead boiled with about the 



liquor by evap. Ctb P art °f lls ovvn weight of litharge deprived of its carbonic 



acid); 



