At prcfcnt the ufe of the Bark i* chiefly confined to the 

 pale -ii nl i el kind; ami the nearer the former ic(cmbk> 

 the- latter, the more it is eftecmed. 



" The Peruvian Bark yields it* vinucs both to cold and 

 boiling water; but the decoction is thicker, gives out its 

 taflc more readily, and form* an ink with a chalybeate 

 more fuddcnly tlian the freih cold iiifunon. 'ITiis infu- 

 fion, however, contains at Icnlt as much extractive nutter, 

 but more in a Date of Iblution; and its' colour on Handing 

 with the clialybcatc become* darker, while that of the 

 decoction becomes more faint. Wbet) baej l« of ■ cer- 

 Uiu age, the addition of a chalybeate renders them green ; 

 nnd when thUii ihcioic.tlicy arc found to l>c inaiiatcof 

 fermentation, and effete. Mildoreauliicalk,: 



checxtraAive matter, whkb in the .ca&ctf the 

 cauitic alkali U rc-chflblvcd by a faithcr addition of the al- 

 kali. Lime-water precipitate* lef* from a frclli infuhon 

 than fromafrclh decoction; anil In the precipitate of tlm 

 latl fomc mild earth is perceptible. The lofufioa i- by 

 ace reduced to the fame liate with the frcfli decoction, 

 ami (hen they dCpoGt nearly an equal quantity of mild 

 eanhand extractive matter; fo that lime-water as well as 

 may be u&d asa tell of the relative rtrcngth 

 and pcriiliable nature of the di Herein preparations and of 

 dillcrcnt Barks. Accordingly, cold infufions arc found by 

 experiments to l»c lets pcrilhablc than decoctions ; iniu- 

 fioiu and decoction* of the red Bark, than thofc of the 

 nak ; thofc of the red bark, however, are found by length 

 1 of 



