Am.  Jour.  Pharru.  \ 
January,  1898.  / 
Gum  from  the  Oil  Tree. 
15 
The  liquids  boiled  at 
Temperatures. 
Initial.  Final. 
Distillate    I   .  .  ioo°  C.  3100  C. 
II  1500  C.  above  3600  C. 
Ill  1500  C. 
iv    .  :  1800  c. 
It  was  obvious,  from  the  irregular  boiling  points  observed  for 
the  fractions,  that  destructive  distillation  had  taken  place  dur- 
ing these  fractionings  of  the  gum,  and,  in  order  to  inquire  into  this 
matter  further,  it  was  decided  to  take  the  specific  gravity  of  the 
several  fractions,  again  refraction  them,  and  take  the  specific  gravity 
of  the  distillates  thus  obtained. 
The  following  table  shows  the  specific  gravities  of  the  fractions 
before  their  last  distillation  and  after  the  same,  also  such  tempera- 
tures of  the  distillates  as  could  be  registered  during  the  distillation : 
Specific  Gravities.  Temperatures. 
Before  After 
Distillation.    Distillation.  Initial.  jfinal. 
Distillate    I  ....  .     '920  -910  900  C.  2600  C. 
II                   '942  -913  1500  C.  3600  C.  and  higher. 
III                   -976  -929  1500  C.  3600  C.  " 
IV                   -946  -931  190°  C.  36o°C.  " 
These  were  again  refractioned  under  reduced  pressure,  and  their 
specific  gravities  and  temperatures  were  again  taken  when  the  fol- 
lowing variations  were  found : 
Specific  Gravities.  Temperatures. 
Before  After 
Distillation.    Distillation.     Initial.  Final. 
Distillate     I   -910  -910  750  C.  2400  C. 
II   -913  -910  1150  C.  2650  C. 
III   -929  -923  ioo°  C.  2900  C. 
IV   -931  -915  1550  C.  3000  C. 
Another  portion  of  125  grammes  of  the  gum  was  fractionally  dis- 
tilled under  ordinary  atmospheric  pressure,  and  the  four  fractions 
were  collected  as  before.  The  deportment  of  the  gum  under  the 
influence  of  heat  in  this  case,  and  the  character  of  the  distillates, 
were  very  similar  to  those  obtained  in  the  first  distillation  carried 
out  under  reduced  pressure. 
The  distillates  were  all  much  thinner  in  consistency  than  the 
original  gum;  they  were  also  liquid  at  ordinary  temperatures,  and 
possessed  considerable  odor,  while  the  original  material  was  thick 
and  semi-solid  at  ordinary  temperatures,  and  almost  cdorless. 
