476  The  Examination  of  Chaulmoogra  Oil.  { A October^  1915™* 
Analysis. 
As  stated  before,  two  different  kinds  of  oils  were  examined: 
1.  Oil  from  Taraktogenos  Kurzii  seed,  manufactured  by  the  In- 
dian Forests  Products  Company. 
2.  Oil  containing  solid  fat  and  liquid  product,  manufactured  by 
Messrs.  B.  K.  Paul  &  Co.  This  oil  was  filtered  and  the  solid  fat 
(amounting  to  about  50  per  cent,  of  the  total)  removed.  The 
clear  filtered  oil  (a),  and  the  separated  fat  (b)  were  separately 
examined. 
In  this  paper  they  are  designated  as  follows : 
1.  Smith  oil. 
2.  (a)  B.  K.  Paul  oil;  (b)  chaulmoogra  fat. 
The  temperature  of  the  laboratory  throughout  the  time  the 
experiments  were  conducted  was  300  C. 
Examination  of  the  Oils. 
1.  Smith  Oil. — The  oil  was  of  a  pale  yellow  color,  with  a  dis- 
agreeable taste  and  smell.  Sp.  gr.  0.9488  at  300  C.  The  solidify- 
ing point  by  the  titre  test  was  found  to  be  11.90  C,  and  it  re- 
mained liquid  at  150  C.  The  oil  is  acid  to  litmus,  acidity  being  due 
to  the  presence  of  about  11  per  cent,  of  free  acid  expressed  as  oleic 
acid  (see  acid  value,  infra). 
2.  (a)  B.  K.  Paul  Oil. — The  oil  had  a  pale  brownish  color, 
somewhat  darker  than  the  other  oil.  The  odor  was  also  more  in- 
tense than  in  the  case  of  the  other  oil.  Sp.  gr.  0.9471  at  300  C. 
The  oil  gave  two  solidifying  points  by  the  titre  test,  viz.,  21. 50  C. 
and  27 0  C.  The  oil  is  solid  at  15 0  C.  and  liquid  at  300  C.  At 
intermediate  temperatures  different  quantities  of  crystalline  solids 
are  deposited.  The  oil  was  strongly  acid  to  litmus,  acidity  being 
due  to  the  presence  of  a  large  quantity  of  free  acid  (about  44  per 
cent,  expressed  as  oleic  acid)  (infra). 
2..  (b)  Chaulmoogra  Fat. — The  solid  fat,  after  draining  in 
the  filter  paper  for  seven  days,  was  pressed  through  cloth  to  remove 
adhering  oils,  and  then  examined.  It  was  a  white,  crystalline  solid, 
the  solidifying  point  being  by  the  titre  test  33 0  C.  The  reaction  was 
strongly  acid  to  litmus,  the  acid  value,  in  terms  of  percentage  of 
oleic  acid,  being  as  high  as  59.  This  shows  that  it  is  composed  al- 
most wholly  of  free  fatty  acids. 
(A)  Color  Reaction  with  Sulphuric  Acid. — Ten  drops  of 
