728 
Oiticica  Oil. 
Am.  Jour.  Pharm. 
Oct.,  1918. 
sent  the  melting-point  of  the  oil,  and  the  points  of  incipient  and 
complete  fusion  must  both  be  considered. 
Iodine  Value,  179.5. 
Saponification  Value,  188.6. 
Free  Fatty  Acids  as  oleic,  5.7  per  cent. 
Unsaponifiable  Matter,  0.91  per  cent. 
Sp.  Gr.  at  i5-5°/i5-5°  C,  0.9694. 
Refractive  Index  at  40 0  C.  Zeiss,  beyond  the  scale  of  the  Zeiss 
butyro-refractometer. 
Hexabromide  Test. — Only  small  traces  of  hexabromides  sepa- 
rated when  carrying  out  the  test  in  the  ordinary  way,  but  the  solu- 
tion on  standing  at  ordinary  temperature  for  two  or  three  days 
turned  a  deep  brown  color,  and  precipitated  a  pale  liquid  which  was 
not  further  investigated. 
An  attempt  was  made  to  separate  the  liquid  fatty  acids  and  obtain 
their  iodine  value,  but  the  difficulties  involved  in  attaining  the  sepa- 
ration of  these  acids  without  oxidation  proved  so  great  as  to  render 
the  results  unreliable. 
In  order  to  obtain  some  idea  as  to  the  value  of  the  oil  to  the  var- 
nish and  paint  maker,  the  following  experiments  were  also  carried 
1.  Heat  Polymerisation  Test. — The  oil  was  heated  to  a  tem- 
perature of  2500  to  2700  C.  in  an  atmosphere  of  carbon  dioxide  (in 
order  to  avoid  oxidation)  for  thirty  minutes,  during  which  time  no 
solidification  took  place,  though  a  sample  of  tung  oil  treated  in  the 
same  way  solidified.  It  was  noticed,  however,  that  during  the  heat- 
ing very  small  bubbles  of  gas  commenced  to  form  as  soon  as  the 
temperature  reached  1900  C,  but  it  was  not  until  the  temperature 
reached  2800  C.  that  these  bubbles  increased  to  a  noticeable  extent. 
Upon  reaching  3000  C,  very  large  bubbles  were  evolved,  and  the 
Incipient  fusion 
Complete  fusion 
21.50  C. 
65.090  C. 
Fatty  Acids. 
537°  C. 
67.00  C. 
42.80  C. 
Titer  Test 
out : 
