438 
Senega,  Euonymus  and  Quillaja.  {^l^^m. 
h 
Fig.  10.  Powder  of  Quillaja  magnified  75  diameters ;  a,  medullary  ray ;  b, 
bast ;  c,  crystals  of  calcium  oxalate  ;  d,  sclerotic  tissue. 
Fig.  11.  Powder  of  bark  of  root  of  Euonymus  magnified  75  diameters ; 
a,  medullary  ray  ;  b,  bast ;  c,  suber. 
tory,  and  show  the  appearance  of  the  drugs  under  consideration  in 
as  nearly  a  representative  manner  as  possible.* 
*  This  preliminary  paper,  containing  the  brief  text  to  accompany  the  draw- 
ings, is  published  at  this  time  mainly  to  complete  the  record  of  the  year's  work 
as  a  member  of  the  Committee  of  Research. 
Iv.  B.  S. 
