Am.  Jour.  Pharm.  > 
July,  1880.  J 
Structure  of  Dye-PF oods. 
sents  a  dark  red  base,  in  which  innumerable  compact  or  more  loosely- 
arranged  cross-bands  of  dull,  almost  brick-red  color,  are  lodged.  At 
some  places  these  bands  appear  swollen  into  knots,  and  in  each  swell- 
ing is  found,  on  the  rule,  a  duct  of  almost  0*3  mm.  diameter,  which  is 
at  once  discerned  by  the  naked  eye  to  be  a  tube.  The  remarkably 
fine  medullary  rays  are  only  visible  with  the  lens,  and  are  represented 
by  figure  6.  They  are  almost  exactly  of  equal  distance  from  each 
other,  and  somewhat  curved  about  the  larger  ducts. 
To  the  naked  eye  the  tangent  section  appears  covered  with  very 
delicate,  slightly  wavy  cross-lines,  which  (as  seen  under  the  micro- 
scope) as  with  Brazil-wood,  where  they  are  less  striking  and  finer,  are 
produced  by  the  regular  disposition  of  the  medullary  rays;  5  cross-lines 
are  equal  to  i  mm.  The  ducts  on  the  longitudinal  sections  appear 
mostly  as  somewhat  bent,  dark-brown  and  shining  half-tubes.  The 
radial  section  shows  the  small,  almost  equally  high  medullary  rays, 
which  form  a  wave.  There  is  slight  indication  of  longitudinal  lines, 
resulting  from  the  concentric  parenchymous  layer  of  wood  fibre.  The 
ducts  are  visible  to  the  naked  eye,  complete  and  strongly  lustrous. 
Frequently  they  occur  on  the  radial  cleavage  planes  as  unaltered  tubes. 
Under  the  lens  the  cross-sections  of  the  medullary  rays  on  the  tangent 
planes  are  defined  in  the  form  of  fine,  almost  black  stripes,  about  0*2 
mm.  in  length.  On  the  radial  longitudinal  section  the  medullary  rays 
appear  covered  with  very  fine  and  innumerable  cross-lines.  The  lens 
shows,  too,  the  sections  of  the  ducts,  which  are  somewhat  longer  than 
broad,  and  very  distinct. 
The  African  sandal-wood  cannot  be  distinguished  macroscopically 
or  microscopically  from  the  Asiatic  with  any  certainty.  According  to 
Vogel  ("Lotos,"  1873),  probably  a  little  brighter  colored,  and  the 
ducts  are  somewhat  larger. 
5.  Cam-wood  (from  Baphnia  nitida)  is  very  curiously  constructed. 
The  cross-section  (Fig.  7)  shows  neither  ducts  nor  medullary  rays  to 
the  naked  eye,  but  delicate,  frail,  wavy  parallel  or  slightly  divergent 
parenchymous  zones.    Under  the  lens  the  ducts  appear  as  minute 
