308 
NOTE  ON  BOWER'S  GLYCERIN. 
The  results  were  equally  satisfactory,  and  in  this  manner  I  have 
detected  croton  oil,  in  the  so  called  castor  oil  capsules. 
It  appears  to  me  possible  that  croton  oil  may  in  this  manner 
be  detected  in  the  stomach  of  animals  poisoned  by  it ;  but 
not  having  the  leisure  for  further  experiments  at  present,  I  shall 
have  to  defer  this  subject  until  some  other  time. 
According  to  Dr.  Schlippe,  croton  oil  contains  about  4  per 
cent,  of  crotonol,  and  it  is  therefore  necessary  to  operate  very 
carefully,  and  without  wasting  anything.  One  accustomed  to 
work  with  small  quantities,  will  not  fail  to  detect  it. 
In  conclusion,  I  will  remark,  that  in  pills  and  emulsions, 
croton  oil  is  detected  in  precisely  the  same  way ;  these  prepa- 
rations are  first  exhausted  with  ether,  and  the  residue  from  the 
evaporation  of  the  ether  is  employed. 
Philadelphia,  June,  1860. 
NOTE  ON  BOWER'S  GLYCERIN. 
By  T.  S.  Wiegand. 
The  steadily  increasing  demand  for  glycerin  renders  it  ex- 
tremely desirable  that  every  improvement  in  its  manufacture 
should  be  promptly  noted,  and  this  more  particularly  so  when 
occurring  in  our  own  country  ;  these  considerations  have  in- 
duced  me  to  call  the  attention  of  pharmaceutists  and  the  drug 
trade  generally,  to  the  article  prepared  by  .Mr.  Henry  Bower, 
of  Philadelphia,  and  offered  for  sale  by  many  of  the  leading 
druggists  ;  that  those  whose  attention  has  not  been  called  to  the 
fact,  that  this  make  is  in  every  particular,  as  far  as  a  number  of 
carefully  conducted  experiments  went  to  show,  an  article  fully 
equal  to  the  celebrated  make  of  Price,  of  London.  The  specific 
gravity  of  a  sample  examined  was  1.25125,  Price's  being  bit 
1.251,  according  to  the  experiments  of  Prof.  Campbell  Morfit. 
To  ascertain  its  freedom  from  inorganic  matter,  tests  were  ap- 
plied carefully,  the  entire  absence  of  lime,  iron,  lead  and  copper 
was  fully  established,  thus  evidencing  the  care  used  in  its  pre- 
paration, while  every  effort  to  obtain  any  of  the  odorous  fatty 
matters,  which  have  heretofore  prevented  the  American  made 
glycerins  coming  into  general  use,  was  entirely  unsuccessful. 
