424 
FUSEL  OIL  FROM  INDIAN  CORN  AND  RYE. 
tered  and  evaporated  to  crystallization.  On  cooling,  crystals  were 
obtained,  which,  under  the  microscope,  and  especiallyby  polarized 
light,  appeared  as  thin  rhombic  plates  very  much  broken.  I  could 
not  detect  two  different  kinds  of  crystals.  When  dried  for  fifty 
hours  in  vacuo  over  sulphuric  acid,  these  crystals  presented  the 
appearance  of  pearly  scales,  fatty  to  the  touch.  The  mother 
waters  gave  a  similar  salt,  and  the  mother  water  from  these  gave 
a  small  quantity  of  cauliflower-like  crystals  of  the  same  appear- 
ance under  the  microscope;  after  having  been  dried  in  vacuo, 
their  crystals  blackened,  and  were  decomposed  when  heated  to 
100°  C. 
The  following  is  the  amount  of  sulphate  of  baryta  they  contain, 
determined  by  incineration.  They  were  difficult  to  burn,  and  after 
ignition  they  were  moistened  with  a  drop  of  sulphuric  acid,  and 
ignited  a  second  time  : 
0-6105  gave  BaOSOa  =  0-30325  =  49-67  per  cent, 
0-58525  «    BaOSOa  ==  0-2895    =  49-47 
Anhydrous  sulpho-amylate  of  baryta  contains  49*49  per  cent,  of 
sulphate  of  baryta. 
Towards  the  close  of  this  investigation,  I  met  with  Wurtz's 
paper  on  the  occurrence  of  butylic  alcohol  in  a  fusel  oil  examined 
by  him.  I  was  therefore  desirous  of  looking  for  this  body  in  the 
fusel  oil  under  examination.  The  oils  left  by  adding  water  to  the 
product,.  81° — 119°,  after  having  been  treated  as  described,  were 
in  small  quantity,  and  contained  fusel  oil  and  oil  of  turpentine, 
besides  a  little  water.  They  began  to  boil  at  105°,  and  were  sepa- 
rated in  two  portions;  those  passing  between  106° — 110°,  and 
those  above  110°.  These  two  portions  were  treated  with  sulphuric 
acid,  and  the  baryta  salts  formed.  Of  these,  only  the  liquid  pass- 
ing at  106° — 110°,  yielded  enough  for  analysis,  which  was  ren- 
dered uncertain  by  having  unfortunately  used  for  neutralization 
native  carbonate  of  baryta  which  contained  lime,  and  which  was 
only  discovered  on  examining  the  salts  under  the  microscope,  when 
the  crystals  of  sulphate  of  lime  were  detected.  The  solutions  were 
then  evaporated  to  dryness,  and  exhausted  with  alcohol.  The  salts 
proceeding  from  the  distillate  above  110°  yielded  a  small  quantity 
of  confusedly  crystallized  granules,  not  sufficient  in  quantity  for 
analysis.    The  remaining  portion  gave  a  salt  appearing  in  lance- 
