A™ctober  imS™'}  The  Examination  of  Chaulnwogra  Oil.  481 
(2)  The  fatty  acids  from  B.  K.  Paul  oil  gave  solidifying  point 
at  33°  C.  ^  was  a^so  recrystallized  once  from  alcohol  and  then 
from  benzene,  but  the  solidifying  point  remained  the  same.  The 
melting-point  was  also  33 0  C. 
No  acid  of  melting-point  68°  C.  could  be  isolated  by  fractional 
crystallization. 
(A)  Saponification  Value. —  (1)  Fatty  acid  from  Smith  oil. 
1.0348  required  for  neutralization  after  saponification  25  Cc.  semi- 
normal  acid.    Therefore  saponification  value  = 
(33-5  ~  25)  X  28-06  =  g 
1-0348  0 
(2)  Fatty  acid  from  B.  K.  Paul  oil.    1.1876  grammes  of  fatty 
acid  required  for  neutralization  after  saponification  23.6  Cc.  acid. 
Therefore  saponification  value  =  (33-5-23-6)X28-o6  =  -2^mgm 
i- 1876 
(B)  Neutralization  Value. — 1(1)  Acid  from  Smith  oil. 
3.0178  grammes  required  124.6  Cc.  decinormal  alkali  solution. 
Therefore  milligrammes  of  KOH  required  to  neutralize  1  gramme 
of  fatty  acid  or  its  neutralization  number  =  124  6  x  5'61  =  2^1.6. 
3.0178 
(2)  Acid  from  B.  K.  Paul  oil.   3.  7004  grammes  of  acid  required 
156.7  Cc.  of  decinormal  alkali.    Therefore  neutralization  value  = 
1567X5  61  =     -  , 
37004  .      ■  D 
The  difference  between  neutralization  value  and  saponification 
value  being  small — 0.16  in  case  of  Smith  acid  and  3.6  in  case  of  the 
other — proves  the  absence  of  any  lactones. 
(C)  Hubl  Value. —  (1)  Acid  from  Smith  oil.  0.3180  grammes 
of  acid,  after  treatment  with  iodine  solution,  required  16.7  Cc. 
thiosulphate  solution.  Blank  experiment  required  41.3  Cc.  thio- 
sulphate.    Therefore  Hubl  value  =  (4i-3  -  167)  X  -0127  X  100^8.23. 
Another  sample  gave  94.26. 
(2)  Acid  from  B.  K.  Paul  oil.    0.3094  grammes  required  14.1 
Cc.  the  sulphate  solution.   Therefore  Hubl  value  = 
(41-3-  14-1)  X -0127  X  100     =    345400  = 
•3094  3094  *  6' 
Another  sample  gave  109.84. 
The  above  quantitative  examination,  as  also  the  physical  prop- 
erties, show  that  the  fatty  acids  obtained  from  the  two  sources 
have  very  nearly  the  same  composition. 
