36 
North  A  merican  Conifer &. 
/Am.  Jour.  Pharm. 
I    January,  1896. 
cipitates  with  lead  acetate,  ferric  chloride  and  bromine  water  ;  the 
last  two  reagents  indicated  a  tannin  lflce  that  found  in  oak  bark. 
That  part  of  the  absolute  alcohol  extract  which  remained  undis- 
solved by  water  was  thoroughly  dried  and  afterwards  treated  with 
petroleum  ether,  which  dissolved  the  greater  portion  of  the  mate- 
rial. The  small  amount  which  was  insoluble  in  the  last-named 
solvent  was  of  a  brown  color,  and  showed  a  decidedly  gritty  feel 
Fig.  7,  small  portion  of  cross-section  of  the  bast  of  the  stem,  magnified  500 
diameters,  a,  a',  a" ',  large  mucilage  cells  (usually  also  containing  tannin); 
b,  b'>  tannin  cells  ;  c,  tangentially  flattened  sieve-tissues. 
This  species  is  destitute  of  bast  fibres. 
when  rubbed  with  a  glass  rod.  The  petroleum  ether  dissolved  the 
wax,  some  chlorophyll,  and  the  fatty  substances. 
After  the  leaves  had  been  completely  exhausted  with  absolute 
alcohol,  and  as  much  as  possible  of  this  liquid  drained  off,  the  last 
