I 'LATE 19 



CRYSTAL-BEARING FIBRES CK BARKS 



1. Frangula (Rhamnus frangula, L.)- 



2. Cascara sagrada (Rhamnus pur ski-ana, D.C.). 



3. Spanish licorice (Glycyrrhiza glabra, L.). 



4. Witch-hazel bark (Ilamamdis virginiana, L.). 



