Am'/uiy?i908arm'}     Examination  of  Commercial  Ginger.  307 
a  lens  show  numerous  black  resin  dots.    The  odor  is  aromatic  and 
the  taste  is  acrid,  but  less  persistent  than  in  some  of  the  other  kinds. 
Jamaica  Ginger. — The  main  branches  of  the  rhizome  appear  to 
Fig.  2. — Transverse  sections  showing  relative  width  of  cortex  in  the  follow- 
ing commercial  gingers  :  A,  African  ;  B,  Calcutta  ;  C,  Calicut  ;  D,  Cochin  ;  E, 
Jamaica ;  Fy  Japan. 
C,  cork  ;  R,  pigment  layer  ;  P,  parenchyma  of  cortex,  containing  secretion 
cells  and  fibrovascular  bundles  ;  E,  endodermis  ;  S,  stele  with  parenchyma, 
secretion  cells  and  fibrovascular  bundles. 
be  comparatively  small,  and  the  pieces  vary  from  2  to  4  cm.  long, 
and  from  2  to  17  mm.  wide.  All  of  the  periderm  is  removed  and 
the  surface  is  smooth  and  grayish-white  to  dark  gray  in  color.  The 
