C HI ] 



ckar, and put it into a calk by itfelf. Make a 

 fecond extradt with a fmaller quantity of boiling 

 water than before, fo as to draw off a quantity 

 nearly equal to the firlV, and put that alfo into the 

 fame calk with the former. 



Thefe two extra(Jls will probably contain in 

 them as much of the virtues of the bark as the 

 quantity of liquid will abforb. 



A third extraft, rather more in quantity than the 

 other two, may be made from the fame bark, and 

 as foon as drawn off, (hould be returned into the 

 copper again when empty, and applied for the firft: 

 and fecond mafh bf a quantity of frefli bark, as the 

 three extracfls may be fuppofed to have carried off 

 the virtues of the firft. Then proceed as before 

 till all die bark is fteeped, and a ftrong liquid ex- 

 traft is drawn from it. 



The bark, when taken out of the copper, may 

 be fpread in the fun to dry, and ferve as fuel in the 

 fucceeding operations. 



The next procefs is, to evaporate the watery par- 

 ticles from the extrad, by a gentle heat, till it 

 comes to the confiftency of treacle. This may be 

 done cither by the air and heat of the fun, or by 



the 



