Am.  Jour.  Pharm.  \ 
January,  1896.  J 
North  American  Conifer  ce. 
35 
structure  very  similar  to  that  of  Pinus  strobus,  and  a  similar  distri- 
bution of  tannic  matters.  The  tannin  was  also  of  the  same  variety 
and  apparently  about  the  same  in  quantity.  The  leaves  and  roots 
were  not  examined. 
CHEMICAL  COMPOSITION. 
Proximate  Analysis  of  the  Leaves. — When  treated  with  absolute 
alcohol,  the  fresh  leaves  readily  yielded  their  green  coloring  matter 
to  this  solvent,  which  also  removed  the  acid  principle  to  which  their 
Fig.  6,  small  portion  of  longitudinal-radial  section  through  the  xylem  of  the 
stem,  showing  portions  of  four  pitted  tracheids  and  some  medullary  ray  cells 
'  magnified  400  diameters. 
As  in  most  gymnosperms,  the  bordered  pits  are  mostly  confined  to  the  radial 
walls  of  the  tracheids. 
sour  taste  is  due.  The  total  amount  removed  by  absolute  alcohol 
was  18-83  Per  cent.  When  this  extract  was  treated  with  water,  an 
amount  of  it  equal  to  8-74  per  cent,  of  the  leaves  was  dissolved. 
This  aqueous  solution  had  a  strongly  acid  reaction,  and  gave  pre- 
