vessels  measure  from  42  to  84,  average  54  micromm.  Among  the 
tracheides  are  parenchymatous  cells  (Fig.  2),  having  about  the  same 
diameter  as  the  former,  and  containing  the  volatile  oil;  they  are  iso- 
lated, but  two  or  three  are  close  together.  Cells  containing  crystals  of 
calcium  oxalate  are  arranged  in  vertical  rows  (Fig.  3),  and  seen  single 
in  transverse  section.  The  medullary  rays  consist  of  two  rows  of 
thickened  pitted  cells,  and  contain  resin. 
Macassar  Sandal  Wood  is  lighter  than  water,  cuts  with  difficulty 
transversely,  but  cleaves  easily.  The  heart  wood  is  pale  fawn  colored 
or  yellowish  brown,  with  darker  concentric  zones,  less  strongly  odorous 
than  the  preceding,  and  of  an  aromatic  taste.  Its  histological  structure 
is  the  same  as  the  preceding,  except  that  the  wood  wedges  have  an 
average  breadth  of  124  micromm.,  and  the  vessels  an  average  diam- 
eter of  48  micromm.  When  sections  of  the  wood  are  treated  with 
solution  of  iodine,  the  volatile  oil  acquires  an  intense  black  color,  such 
a  color  being  not  produced  with  Indian  sandal  wood  oil.  It  is  uncer- 
tain whether  Macassar  sandal  wood  is  derived  from  Santalum  album. 
West  Indian  Sandal  Wood. — The  specimen  examined  by  Mr.  Kirkby 
was  a  section  of  a  stem  57  mm.  in  diameter,  the  bark  being  1  mm. 
thick;  duramen  (including  pith,  1  mm.)  27  mm.  in  diameter;  average 
