402         •       Analytical  Resear  dies  and  Investigations,  {^^^^^^^^^^^i^^l^^' 
rose-colored  solution  is  first  obtained,  which  afterward  becomes  blue, 
and  on  the  addition  of  ammonia  in  excess  the  green  color  is  repro- 
duced. The  solution  of  morphine  in  sulphuric  acid,  on  the  addition 
of  a  little  sulphide  of  sodium  dissolved  in  water  and  heated,  produces 
a  rose-color  which  changes  to  violet  and  finally  to  a  dark  green;  the 
same  sulphuric  acid  solution  of  morphine  with  an  alkaline  sulphide, 
mixed  with  sulphuric  acid  to  which  chlorate  of  potassium  has  been 
previously  added,  produces  a  green  and  then  a  violet  color,  which 
changes  to  yellow  on  the  addition  of  an  excess  of  chlorate ;  codeine 
produces  analogous  reactions. 
If  to  atropine  the  sulphuric  acid  solution  of  chlorate  of  potassium  be 
added,  drop  by  drop,  and  the  vessel  containing  the  mixture  be  agitated, 
there  are  developed  greenish-blue  stripes,  and  finally  the  liquid  becomes 
slightly  green. — Jour,  de  Plumn.  et  de  Chim.,  v,  1882,  p.  633. 
On  the  Volatile  Oil  of  Sanded  Wood.  By  P.  Chapoteaut. — The  vol- 
atile oil  of  sandal  wood,  which  Avas  formerly  employed  exclusively  in 
the  art  of  perfumery,  has  since  found  a  therapeutic  application  by  the 
re])lacement  in  part,  if  not  completely,  of  balsam  of  copaiba. 
It  is  obtained  by  distillation  with  the  vapor  of  water  from  sandal 
wood  (Santalum  album,  of  Bombay).  The  yield  of  volatile  oil  from 
100  kilos  of  wood  varies  from  1  kilo  250  grams  to  2  kilos  800  grams, 
according  to  the  more  or  less  ancient  origin  of  the  wood. 
The  oil  is  a  somewhat  thickisli  liquid,  having  the  specific  gravity 
0-945  at  15°C. ;  it  boils  between  300  and  340°C.,  and  consists  almost 
entirely  of  two  oxygenated  oils,  having  the  composition  C^jIIg^O  and 
C\.Il260,  of  which  the  first  boils  at  about  300°C.,  the  latter  at  about 
310°C.  The  first  is  contained  in  the  oil  in  much  larger  quantity  than 
the  second. 
Action  of  dehydreding  a^('7?f6'.— Phosphoric  anhydride  deprives  the 
oil  of  two  molecules  of  water,  forming  the  hydrocarbons  C15II22  and 
C15H24,  of  which  the  former  boils  at  245°C.,  the  latter  at  about  260°C. 
The  volatile  oil  of  cedar,  deprived  of  its  oxygenated  portion,  possesses 
exactly  the  composition  of  the  hydrocarbon,  C15H22,  and  boils  at  the 
same  temperature ;  it  is  thus  probable  that  the  two  products  are  iden- 
tical. As  to  the  hydrocarbon,  C\5Ho4,  it  is  isomeric,  or  identical  with 
the  oil  of  copaiba. 
Action  of  heat. —By  slow  distillation  the  oil  of  sandal  yields  pro- 
ducts boiling  below  250°C.  and  above  350°C.,  at  the  same  time  form- 
