PERUVIAN BARK. 
All the Barks yield their virtues both to cold 
and boiling water. The officinal preparations 
are, 1. the Powder; 2. the Extract; 3. the 
Resin; 4. the Spirituous Tincture ; and, 5. the 
Decoction. 
The most efficacious form is thought to be 
that of the Powder ; as the constituent parts 
are thus administered in the most effectual pro- 
portion. A judicious union of the Decoction 
and Tincture, however, is for many intentions 
greatly efficacious. 
