A^'ctoberPi907.m* }    Examination  of  Lippia  Scaberrima.  459 
The  ethereal  solution  of  the  readily  soluble  portion  of  the 
extract,  which  was  by  far  the  greater  part,  was  then  shaken  with  a 
solution  of  sodium  carbonate.  This  treatment  caused  the  separation 
of  the  sodium  compound  of  an  acidic  resin,  in  the  form  of  a  dark 
green,  slimy  mass,  which  was  sparingly  soluble  in  water.  On  treat- 
ment with  sulphuric  acid,  this  sodium  compound  yielded  a  quan- 
tity (40  grammes)  of  a  resin,  which,  after  solution  in  ethyl  acetate, 
and  purification  with  animal  charcoal,  was  obtained  in  the  form  of 
an  uncrystallizable,  light-colored  varnish.  The  ethereal  liquid  which 
had  been  extracted  with  sodium  carbonate  solution  was  treated  with 
a  10  per  cent,  solution  of  sodium  hydroxide,  but  this  afforded  only 
a  small  quantity  of  a  tarry  sodium  compound,  from  which  nothing 
crystalline  could  be  obtained.  The  portion  of  the  ether  extract  of 
the  resins  devoid  of  acidic  properties  still  remained  dissolved  in  the 
ether,  and  this  solution  was  therefore  washed,  dried  and  evaporated. 
The  dark  green,  resinous  residue  was  allowed  to  stand  for  a  few 
days,  when  it  deposited  a  very  small  quantity  of  a  granular 
substance,  which,  when  separated  from  its  solution  in  ethyl  acetate, 
was  yellowish  in  color,  and  apparently  minutely  crystalline.  As 
this  substance  possessed  the  properties  of  a  hydrocarbon,  it  was 
warmed  on  a  water-bath  with  concentrated  sulphuric  acid  during 
half  an  hour,  in  order  to  destroy  any  resinous  impurities  contained 
in  it.  After  this  treatment  the  substance  was  recovered,  and  was 
apparently  in  a  state  of  greater  purity,  as  it  was  then  colorless.  It 
melted  at  8o°  C,  and  was  doubtless  a  hydrocarbon  of  high  mole- 
cular weight,  probably  possessing  a  formula  approximating  to 
^39^80* 
III.  Chloroform  Extract  of  the  Resins. 
This  was  a  dark  green,  soft  solid,  and  weighed  24  grammes. 
It  was  redissolved  in  chloroform,  and  extracted  with  a,  solution  of 
sodium  carbonate.  On  acidifying  the  alkaline  solution  thus 
obtained,  a  brown  powder  was  precipitated,  which  was  collected 
and  dried  on  a  porous  tile.  This  substance  was  then  dissolved  in 
alcohol,  and  purified  by  means  of  animal  charcoal,  when  it  was 
obtained  in  beautiful  yellow  needles,  which  melted  and  decomposed 
at  about  2680  C.  The  total  amount  obtained  was  less  than  o-i 
gramme,  but  it  was  analyzed  with  the  following  result : 
0-0518  gave  o-iiio  C02  and  0-0265  H20.    C  =  58-4;  H  =  57. 
C22H2601()  requires  C  =  58-7  ;  H  =  5-8  per  cent. 
