38 
North  American  Conifer ce. 
f  Am.  Jour.  Pharm. 
\    January,  1896. 
The  constituents  of  the  ash  of  the  bark  appear  to  be  identical 
with  those  of  the  leaves. 
PINUS  EXCELSA,  WALL. 
Proximate  Analysis  of  the  Leaves. — Absolute  alcohol,  applied  as  in 
the  case  of  Pinus  Strobus,  removed  16-23  percent,  of  the  weight  of  the 
leaves.  This  extract  contained  almost  all  of  the  green  coloring  mat- 
ter of  the  leaf,  and  showed  a  strongly  acid  reaction.  When  the  extract 
was  treated  with  water,  an  amount  equal  to  5-99  per  cent,  of  the 
leaves  was  dissolved.  This  water  solution  had  an  acid  reaction,  and 
contained  an  iron-greening  tannin.  Much  of  the  extract  left  undis- 
solved by  water  was  soluble  in  petroleum  ether,  to  which  it  imparted 
a  dark-green  color.  Some  brown,  resinous  substance  was  undis- 
solved by  the  petroleum  ether.  The  principle  exhibiting  the  gritty 
character,  found  at  this  stage  in  Pinus  Strobus,  was  also  found  here. 
Water  applied  to  the  leaves  after  their  exhaustion  with  absolute 
alcohol  dissolved  5-74  per  cent,  of  their  weight.  The  water  solu- 
tion contained  mucilage  in  very  small  amount,  but  reacted  decidedly 
with  Fehling's  solution  for  glucose. 
Proximate  Analysis  of  the  Bark  of  the  Stem. — This  part  yielded 
25-06  per  cent,  of  extract  to  absolute  alcohol.  The  green  color  of 
the  bark  was  entirely  removed.  The  alcoholic  liquid  was  acid  in 
reaction.  From  this  extract  water  dissolved  6-42  per  cent,  of  the 
weight  of  the  bark.  The  solution  so  obtained  was  acid  in  reaction, 
and  behaved  towards  reagents  in  exactly  the  same  way  as  did  the 
corresponding  extract  in  the  analysis  of  Pinus  Strobus. 
Petroleum  ether  dissolved  the  chlorophyll  and  wax  from  the  ex- 
tract, but  left  considerable  of  a  brown  resinous  substance,  and  the 
principle  having  the  gritty  character  undissolved. 
Water  was  next  applied  to  the  bark.  It  removed  mucilage  and 
glucose.  Its  solution  was  of  a  mucilaginous  character,  as  was  that  of 
Pinus  Strobus. 
Estimations  of  Tannin  in  the  Several  Parts  of  Pinns  excelsa. — 
These  estimations  were  carried  out  as  described  under  Pinus  Strobus, 
and  the  results  calculated  in  the  same  manner.  The  following  table 
embodies  the  percentages : 
Ash  in  abso-      Tannin  in       Tannin  in 
lutely  dry  moist         absolutelj-  dry 
Moisture.        material.         condition.  condition. 
Leaves   17-85  2'8o  2*93  3-56 
Stem  bark   7*99  2-i8  7*69  8-36 
Root  bark   8*99  3*03  6*o8  6*68 
