274 
Oil  of  Camphor. 
Am.  Jour.  Pharm. 
June,  1889. 
the  same  as  No.  III.,  as  its  boiling  point  was  the  same,  its  sp.  gr. 
0*8863  at  16°  C,  and  its  other  physical  properties  identical. 
No.  V.  from  a  dealer  in  New  York  was  no  doubt  the  same  as  III. 
and  IY,  as  it  only  differed  by  having  the  sp.  gr.  of  0*8803  at  16°  C. 
No.  VI.  from  a  New  York  importing  firm,  marked  "  rectified"  had 
a  sp.  gr.  of  1*006  at  16°  C,  and  boiled  at  210°  C.  Its  color  was  a 
light  yellow,  and  odor  that  of  sassafras  and  slightly  camphoraceous. 
No.  VII.  from  wholesale  druggists  of  Philadelphia  was  similar  to 
No.  VI.,  with  a  sp.  gr.  of  0*9903,  boiling  point  of  206°  C,  and  some- 
what darker  color. 
No.  VIII.,  also  from  a  wholesale  drug  firm  of  Philadelphia,  was 
dark  reddish  brown,  with  an  empyreumatic  and  camphoraceous  odor,  a 
sp.  gr.  of  0*9546  at  16°  C,  and  a  boiling  point  of  198°  C. 
They  all  had  an  acid  reaction ;  all  were  miscible  in  all  proportions 
with  95  per  cent,  alcohol. 
As  I.  and  II.  appeared  to  represent  the  crude  product,  they  were 
taken  for  analysis.  No.  I.  we  were  able  to  get  in  considerable  quan- 
tity, and  in  most  of  the  following  work  it  was  used. 
The  remaining  samples  were  submitted  to  fractional  distillation  in 
vacuo,  and  samples  III.,  IV.  and  V.  were  found  to  contain  from 
1-3  per  cent,  of  camphor  in  solution  in  the  light  fractions  of  camphor 
oil.  Samples  VI.  and  VII.  consisted  of  the  intermediate  portions  of 
the  commercial  oil,  the  lowest  and  highest  boiling  fractions  being  en- 
tirely absent.  Sample  VIII.  contained  all  the  fractions,  the  lightest 
in  smaller  quantity  only,  but  it  was  quite  empyreumatic,  and  yielded 
a  considerable  quantity  of  a  solid  residue  at  235°  C.  Each  sample 
was  submitted  to  the  action  of  polarized  light,  I.,  II.  and  VIII.  being 
first  decolorized  with  animal  charcoal.  The  following  readings  were 
obtained  with  the  200  mm.  tube  in  a  Wild  polaristrobometer : 
1.   +  49°*  j  5   +  62.2°. 
2   +  32.6°.  6   4-  28.6°. 
3   4-  61°.  7   +  38.2°. 
4   +62.2°.        I  8   +  1°. 
The  following  results,  it  will  now  be  understood,  apply  to  sample 
No.  1.  An  alcoholic  solution  of  ferric  chloride  produced  no  change 
when  mixed  with  the  oil,  and  negative  results  were  likewise  gotten 
with  saturated  solution  of  sodium  bisulphite  and  with  alcoholic  ammo- 
nium sulphide.  Alcohol  and  fixed  oils  were  found  to  be  absent  from 
the  sample. 
