530 
Cinchonas  of  U.  S.  Commerce. 
Vm    )our  h'harm 
Nov  ,  u8o 
resin-cell  in  cinchonas  is  certainly  limited  to  the  thicker  walled  of  the 
class.  In  support  of  this  view  the  following  maybe  stated:  These 
cells  have  thick  enough  walls  to  be  pronounced  stone-cells;  in  Berg's 
classification  resin  cells  do  not  appear,  but  the  term  stone-cell  is  used, 
and  used  oniv  where  the  Dispensatory  uses  resin-cells.     In  addition. 
Younger  cjuill  ca'isaya.    x  40. 
we  find  in  the  Dispensatory,  "Some  species  have  ....  cells  with 
thickened  walls;  ....  some  of  these  cells  contain  a  brown  mass  of 
resinous  aspect,  others  are  filled  with  crystals  of  calcium  oxalate  ;  hence 
the  terms  resin-cells  and  crystal-cells^''  and  in  the  Pharmacographia  ^  is 
found  nc2 1  ly  the  same  expression.     The  conclusions  are  then,  ist,  that 
^  Fliickiger  and  Hanbury,  p.  319. 
