ANALYSIS  OF  RED  SANDAL  WOOD. 
9 
, ,  .  .-,  1  Phosphate  of  magnesia, 
chloric  acid      ~     r.  .  °  7 
2.24 
0.89 
1.34 
0.25 
Coloring  matter, 
Insoluble    5  ^?n^n' 
69.50 
1.31 
100.00 
Oonelusio7is. — The  author  remarks  that  the  coloring  matter, 
which  may  be  called  the  active  principle,  is  very  intimately 
combined  with  the  ligneous,  resinous  and  saline  matters. 
The  santalin  of  M.  Pelletier,  he  considers  to  be  impure,  and 
to  contain  resin.  The  difficulty  has  been  to  free  it  from  this 
substance.  The  author  has  obtained  santalin  perfectly  definite 
in  its  composition,  differing  in  its  composition  and  physical  pro- 
perties from  the  santalin  of  Pelletier  which  is  used  in  France 
under  the  name  of  Vegetable  Indian  Red. 
The  authors  results  lead  him  to  consider  pure  santalin  as  a 
nitrogenous  body  having  close  relationship  with  indigotin;  it 
forms  similar  compounds,  sulpho-santalinic  acid,  which  is  pre- 
pared like  sulpho-indigotic  acid,  and  in  this  form  it  can  most 
advantageously  be  employed  by  the  dyer. 
The  author  proposes  to  continue  the  study  of  santalin  in  a 
second  paper,  and  believes  that  plants  should  be  first  carefully 
analysed  proximately  before  their  separate  principles  are  clearly 
studied.  He  has  examined  three  other  specimens  of  red  sandal 
wood  with  the  following  general  results,  viz : 
Volatile  oil  and  acetic  acid, 
Albumen, 
Sugar  and  gum, 
Coloring  matter, 
Resin, 
Tartaric  acid, 
Salts, 
Lignin, 
I. 
1.70 
0.50 
4.50 
19.00 
2.85 
0.85 
2.10 
69.30 
II. 
1.90 
0.40 
3.60 
16.00 
3.00 
0.00 
4.46 
70.64 
III. 
2.10 
0.30 
3.20 
21.60 
3.30 
0.07 
2.03 
67.40 
100.00 
100.00 
100.00 
