Am.  Jour.  Pharjii.) 
April,  1896.  J 
North  American  Conifer  a?. 
199 
procured  from  Prof.  Bastin  also  proved  free  from  added  coloring 
matter.  This  was  also  air-dried.  Thinking  that  there  might  be  a 
difference  on  adding  the  benzin  to  air-dried  material  and  the  sam- 
ples as  received,  the  sample  that  indicated  added  coloring  matter 
was  also  dried  and  the  test  applied  again.  The  coloring  was  again 
indicated,  but  less  pronouncedly  and  less  promptly.  Different  frac- 
tions of  the  benzin  were  also  tried  with  the  same  results.  Benzin 
containing  fractions  varying  from  35 0  C.  to  900  C.  is  just  as  appli- 
cable for  this  test  as  the  fraction  between  500  and  6o°  C,  required 
by  the  U.  S.  P. 
In  concluding  this  paper,  the  writer  wishes  to  state  as  his  expe- 
rience that  drugs  and  chemicals  are  less  frequently  intentionally 
sophisticated  than  that  they  fall  a  trifle  below  the  standard  of 
purity. 
305  Cherry  Street. 
A  CONTRIBUTION  TO  THE  KNOWLEDGE  OF  SOME- 
NORTH  AMERICAN  CONIFERS. 
By  Edson  S.  Bastin  and  Henry  Trimble. 
{Continued  from  page  140.) 
PINUS  ECHINATA,  MILLER. 
PINUS  MITIS,  MICHAUX. 
SHORT-LEAF  PINE,  YELLOW  PINE. 
GENERAL  CHARACTERS. 
The  yellow  pine  is  a  fine,  straight-boled  tree,  attaining  a  diameter 
at  the  base  of  about  2  leet,  and  a  height  of  from  50  to  100  feet. 
Its  wood  is  fine-grained,  moderately  resinous  and  durable. 
It  is  found  occasionally  as  far  north  as  Massachusetts,  but  is  more 
common  farther  south,  from  New  Jersey  to  South  Carolina  and 
Florida,  and  along  the  Gulf  States  westward  as  far  as  Texas.  It 
also  occurs  in  Pennsylvania,  east  Tennessee,  southern  Indiana,  south- 
eastern Kansas  and  Arkansas,  but  is  more  abundant  toward  the 
coast.  It  occurs  in  greatest  abundance  in  dry  or  sandy  soils,  but  is 
found  also  in  the  more  fertile  ones,  where,  however,  it  attains  a 
larger  size. 
Its  branches  are  smoothish  ;  its  leaves  in  twos,  except  on  thrifty 
shoots,  where  they  are  frequently  in  threes,  from  3  to  5  inches  long, 
