128 ORD. Dipterocarpe. DRYOBALANOPS CAMPHORA. 
principle, swi generis; and the researches of modern chemists have ascer- 
tained that it is a principle found in many trees and shrubs, besides those- 
from which the camphor of commerce is obtained: viz. from the roots of 
galangale, zedoary, ginger, and the cinnamon, cassia, and sassafras laurels ; 
and from many of the verticillate tube of plants, as sage, rosemary, lavender» 
hyssop, &c. 
Zea describes a variety of camphor, procured from a tree in South Ame- 
rica, termed Caratte by the natives, the botanical characters of which are not 
known, and from the bark of which the camphor exudes in the form of* 
tears.* 
For the Medical Properties and Uses of camphor, see pages 686 to 694, 
Vol. iv. of this work. 
* An artificial camphor may be prepared by passing muriatic acid gas through oil of 
turpentine. 
