452  Examination  of  Lippia  Scaberrima.     { An0ctS,Pi<w;m' 
Examination  of  the  Resins  {A). 
The  mass  of  black,  tarry  resins  in  the  distillation  flask  was  separ- 
ated from  the  aqueous  liquid,  then  thoroughly  washed  with  hot 
water,  and  dried.  It  amounted  to  275  grammes,  corresponding  to 
3-6  per  cent,  of  the  weight  of  air-dried  herb.  This  crude  resin  was 
mixed  with  purified  sawdust,  and  extracted  successively  with  light 
petroleum,  ether,  chloroform,  ethyl  acetate,  and  alcohol.  All  these 
products  were  separately  examined. 
/.  Petroleum  Extract  of  the  Resins. 
This  extract,  which  constituted  by  far  the  greater  portion  of  the 
total  resin,  was  a  dark  green,  soft  solid,  and  amounted  to  170 
grammes.  Having  ascertained  by  a  preliminary  experiment  that  it 
contained  nothing  of  a  basic,  acidic,  or  phenolic  nature,  it  washydro- 
lysed  by  boiling  with  an  alcoholic  solution  of  50  grammes  of  potas- 
sium hydroxide.  On  subsequently  removing  the  alcohol,  a  dark 
green  mass  was  obtained,  which  was  mixed  with  water,  and  then 
repeatedly  extracted  with  ether.  When  shaking  with  the  first  por- 
tion of  ether  it  was  observed  that  the  liquids  contained  a  small 
amount  of  a  flocculent  precipitate.  This  was  removed  by  filtration, 
and  found  to  consist  largely  of  the  potassium  salt  of  a  fatty  acid, 
but  the  amount  of  acid  (m.  p.  about  81-830  C.)  obtained  from  it  was 
too  small  to  admit  of  its  being  purified.  The  ethereal  extract  of  the 
alkaline  liquid  was  washed,  dried,  and  the  ether  removed,  when  a 
semi-solid,  yellow  residue,  weighing  50  grammes,  was  obtained. 
This  was  distilled  under  15  mm.  pressure,  when  the  following  frac- 
tions were  collected:  140-2050;  205-265 0  ;  265-3300  C./15  mm. 
Fractions  14.0-205°  and  205-265°  C.\i%  mm. — These  fractions 
were  somewhat  thick,  yellowish  oils,  but  the  one  of  higher  boiling 
point  contained  a  small  amount  of  a  crystalline  solid.  This  was  col- 
lected on  a  filter,  and  recrystallized  from  ethyl  acetate,  when  it  was 
obtained  in  beautiful  leaflets,  melting  sharply  at  590  C. 
00600  gave  o  1865  C02  and  0-0787  H20.   C  ==  84-8  ;  H  =  14-6. 
C27H56  requires  C  =  85-3;  H  =  14-7  per  cent. 
This  substance  agrees  in  melting  point  and  composition  with  the 
hydrocarbon  heptacosaney  and  is  doubtless  identical  with  it. 
The  oily  liquid  from  which  this  hydrocarbon  had  been  separated 
was  then  mixed  with  the  fraction  of  lower  boiling  point,  and  the 
mixture  fractionally  distilled  under  20  mm.  pressure,  when  it  was 
