498 SCIENTIFIC AND APPLIED PHARMACOGNOSY 



FIG. 213. Asafetida. X-ray photographs of several kinds of Asafetida, the 

 dark colored fragments being inorganic substances, through which the X- 

 rays do not penetrate. A, mass of ordinary gum resin with considerable 

 inorganic material. B, selected tears, which are almost wholly soluble in 

 alcohol. C, stony Asafetida, consisting of fragments of gypsum which have 

 been coated with a thin layer of Asafetida. After Wilbert. 



