Am^°ne"i89iarm'}  Volatile  Oil  of Aristo  lochia  Reticulata.  261 
tions  mentioned  below.  The  many  repetitions  of  the  operation  are 
omitted  and  only  those  temperatures  which  refer  to  final  distillates 
are  given. 
Fraction.  Boiling  Point.  Pressure.  Approx.  Amount. 
A,  74-75°  43  mm.  10  per  cent. 
B,  122-1240  43    "  60  " 
C,  •         147-150°  477  <c  20  " 
D,  green  and  bluish  fluorescent  oils,  and  decom- 
position resins,  10  " 
The  fractions  when  subjected  to  low  temperatures,  as  was  the 
original  oil,  all  behaved  as  the  latter.  All  were  readily  soluble  in 
glacial  acetic  acid,  and  these  solutions  reacted  with  sulphuric  acid, 
as  follows  : 
A,  Pink,  becoming  brownish. 
B,  Pink,  becoming  brown. 
C,  Red,  deepening. 
This  reaction  of  A  is  that  given  by  some  of  the  pinene  groups  of 
terpenes,  according  to  Wailach  {Liebig  s  Annalen,  2jg}  page  1  ;  also, 
Amer.  Jour.  Pharm.,  1887,  page  619.) 
Fraction  A. — Boiling  point  in  air  1 57°,  barom.  pressure  769-6 
mm.  Pale  greenish  (in  time  becoming  colorless,  but  other  physical 
properties  remaining  unchanged)  liquid  of  a  peculiar  penetrating, 
irritating,  terebinthinate  odor ;  a  peculiar,  characteristic  taste,  and 
an  acid  reaction.  When  blue  litmus  paper  was  held  above  the 
liquid  it  became  red  quite  rapidly.  Satisfactory  tests  were  not 
obtained,  with  either  wet  or^dry  starch  and  potassium  iodide  paper, 
for  ozone.  Water  agitated  with  the  compound  was  subsequently 
found  to  contain  acetic  acid.  It  absorbed  bromine  with  avidity. 
Specific  gravity  at  15*5°  C,  -865.  It  was  obtained  by  fractional 
distillation  alone,  and  without  the  use  of  metallic  sodium  or  zinc. 
The  average  of  two  closely  agreeing  results  of  combustions  made 
of  this  fraction  was  : 
Found.  Calculated  for  C10H10. 
C,   88-225  88-23 
H,  11-835  1177 
100-060 
Vapor  density  :    Found  4-82,  4-84;  calculated  for  C10H16,  4-71. 
Fraction  B. — Boiling  point  in  air  21 1°,  barom.  pressure  763-6 
mm.    Pale  greenish,  almost  colorless,  liquid,  having  an  odor  and 
