350  Sanguinaria  Canadensis,  etc.       {A  Aug.™,"  m2RM* 
was  not  reddened  by  dilute  sulphuric  acid.  During  the  agitation  of 
the  residue  with  ether,  there  was  noticed  a  marked  fluorescence, 
similar  to  that  of  acid  solutions  of  quinia,  which  was  also  observed 
in  alcoholic  solutions,  but  not  to  the  same  degree  as  in  the  former. 
Having  never  read  of  this,  I  thought  it  worthy  of  mention.  The 
ethereal  solutions  were  then  mixed,  and  precipitated  with  a  mixture 
of  sulphuric  acid  and  ether.  The  precipitate  was  dissolved  in  hot 
alcohol,  and  left  to  evaporate  spontaneously. 
The  clear  filtrate  obtained  after  precipitating  the  sanguinarina  by 
ammonia  was  acidulated  and  tested  for  an  alkaloid  by  iodohydrargy- 
rate  of  potassium,  which  caused  a  light  brown  precipitate.  This  was 
collected  on  a  filter  and  washed  well  with  water.  The  filter  was  then 
torn  up  as  before,  and  digested  in  a  concentrated  solution  of  carbonate 
of  soda  for  24  hours,  and  finally  evaporated  to  dryness.  The  residue 
was  treated  with  alcohol  (sp.  gr.  *835)  till  it  would  take  up  no  more. 
The  alcoholic  solution  was  then  evaporated  to  dryness. 
Supposing  that  the  alkaloid,  which  had  caused  the  precipitate  with 
the  iodohydrargyrate,  might  be  a  small  quantity  of  sanguinarina  dis- 
solved by  the  excess  of  ammonia  employed,  some  of  the  acidulated 
watery  infusion  was  precipitated  by  ammonia,  leaving  it  in  excess. 
The  liquid  was  allowed  to  stand  for  a  day  in  the  test  tube,  and  then 
filtered.  A  small  portion  evaporated  on  platinum  foil  left  a  slight 
residue,  but  was  not  reddened  by  dilute  sulphuric  acid.  When  the 
dilute  acid  was  added  in  excess  to  the  liquid  in  the  test  tube,  it  gave 
no  red  color,  as  would  result  with  a  solution  of  sanguinarina.  After 
evaporating  the  alcoholic  solution  the  residue  was  placed  in.  a  flask, 
and  agitated  with  ether  to  remove  any  sanguinarina  that  might  be 
present.  When  the  ethereal  liquid  was  evaporated  on  platinum  foil,, 
it  left  no  residue. 
The  mass  which  was  not  taken  up  by  ether  was  shaken  with  very 
dilute  sulphuric  acid,  and  treated  with  animal  charcoal.  On  evapo- 
ration, fine  needle-shaped  crystals  formed,  and  when  a  small  crystal 
was  exposed  to  heat  on  a  platinum  foil,  it  swelled  up,  blackened  and 
burned,  leaving  only  a  slight  residue;  this,  when  boiled  with  water 
and  filtered,  gave  a  white  precipitate  with  oxalate  of  ammonia  and 
chloride  of  barium,  indicating  a  little  sulphate  of  lime,  probably  de- 
rived from  the  animal  charcoal. 
The  mass  of  crystals  thus  obtained  were  exhausted  with  alcohol 
and  the  alcoholic  solution  evaporated,  when  the  same  needle-shaped 
