202 
Nor tli  American  Conifer  ce. 
Am.  Jour.  Pharm. 
April,  1896. 
ior  to  this  a  cortical  parenchyma  of  considerable  thickness,  destitute 
of  lignified  elements  and  composed  of  thin- walled  cells  of  large  diam- 
eter, mostly  elongated  in  a  tangential  direction.  This  portion  was 
observed  to  be  rich  in  both  tannic  and  resinous  matters,  and  to 
contain  secretion  reservoirs  and  lacunae  of  the  usual  character.  The 
bast  layer  was  also  destitute  of  lignified  elements,  was  for  the  most 
part  small-celled,  contained  in  its  outer  layers  much  crowded  and 
collapsed  sieve-tissue,  and  was  sprinkled  throughout  freely  with 
secretion  cells  of  larger  diameter,  which  contained  tannic  and  oleo- 
resinous  matters.  The  medullary  rays  which  cross  the  bast  layer 
were  especially  rich  in  oleoresin,  which  was  also  abundant  in  the 
medullary  rays  of  the  wood.  The  tracheids  of  the  wood  con- 
tained it  to  some  extent.  Tannic  and  oleoresinous  matters  were 
also  abundant  in  the  pith. 
The  microscopic  study  indicated  that  the  inner  bark  of  this  species 
is  somewhat  less  rich  in  tannic  matters  than  most  of  the  others 
examined,  though  the  difference  is  not  great. 
CHEMICAL  COMPOSITION. 
The  resinous  products  of  the  short-leaf  pine  are  by  far  the  most 
important  constituents. 
For  the  purposes  of  the  present  contribution,  the  moisture,  ash 
and  tannin  of  two  samples  were  estimated.  One  of  these  was  the 
thick,  corky  bark  of  a  full-grown  tree  from  Alabama,  obtained 
through  Dr.  Charles  Mohr;  the  other  was  the  bark  of  a  younger 
tree,  obtained  from  Mr.  Frank  Bassett,  of  Hammonton,  New  Jersey. 
Both  were  collected  about  December  I,  1895. 
Specimen  from 
Alabama.      New  Jersey. 
Per  Cent.  Per  Cent. 
Moisture  9-17  8*22 
Ash  in  absolutely  dry  bark  .  .    1*32  1*52 
Tannin  in  absolutely  dry  bark   18*19  11*26 
The  percentage  of  tannin  in  the  Alabama  specimen  is,  no  doubt, 
too  high,  as  it  was  associated  with  considerable  coloring  matter, 
which,  with  our  present  method  of  tannin  estimation,  is  unavoidably 
retained  by  the  hide  powder  and  recorded  as  tannin. 
ECONOMICS. 
This  pine  figures  somewhat  in  the  turpentine  industry.  Accord- 
ing to  W.  VV.  Ashe,1  there  were  3,000  boxes  of  short-leaf  pine  cut  in 
1 1894,  "The  Forests,  Forest  Lands  and  Forest  Products  of  Eastern  North 
Carolina."    Bulletin  No.  5,  North  Carolina  Geological  Survey. 
