'^"'ocT'iSr'^™  }      Potassio-Bismiithous  Iodide  as  a  Test.  491 
Strychnine :  light  yellow  precipitate  becoming  dark  yellow  after  some 
time  ;  supernatant  liquid  remains  clear. 
Morphine:  reddish-yellow  precipitate  which  agglomerates  at  the 
bottom;  liquid  remains  clear,  precipitate  disappearing  after  a  few 
days  if  the  whole  is  left  at  rest,  and  the  liquid  becoming  canary- 
yellow. 
Codeine:  immediate,  copious,  yellowish-red  precipitate,  remaining 
for  some  time  suspended  in  the  liquid,  and  assuming  a  light  brick-red 
color  when  left  at  rest. 
Atropine:  precipitated  at  first  in  filaments,  but  gradually  settling- 
down  in  the  form  of  a  reddish-yellow  powder,  which  if  left  at  rest 
becomes  canary-yellow,  and  dissolves  after  some  time,  coloring  the 
liquid  golden-yellow. 
Aconitine  :  precipitated  at  first  in  flocks,  but  suddenly  forms  at  the 
bottom  a  chrome-yellow  pulverulent  precipitate,  which  does  not  change 
color  when  left  at  rest,  whereas  the  liquid  becomes  yellow. 
Brucine :  precipitated  at  first  in  filaments  which  ultimately  settle 
down  with  gold-yellow  color,  becoming  paler  when  left  at  rest  for 
some  time. 
Nicotine:  immediate  red  pulverulent  precipitate,  which  suddenly 
falls  to  the  bottom,  and  becomes  reddish-yellow  when  left  at  rest. 
Cicutine:  precipitate  similar  in  character  but  of  darker  color,  and 
becoming  dirty-white  when  left  at  rest. 
Solanine:  slowly  precipitated  with  lemon-yellow  color,  becoining 
darker  on  repose  and  adhering  to  the  bottom  of  the  tube  w^hen  shaken. 
Veratrine:  light  yellow  precipitate  forming  slowly,  remaining  sus- 
pended for  some  time,  and  becoming  light  canary -yellow  when  left  at 
rest. 
Narceine:  light  yellow  precipitate  forming  slowly  and  remaining 
suspended  like  that  of  veratrine,  but  of  deeper  color ;  becomes  rcddish- 
yellow  on  repose. 
Quinine  Sulphate:  immediate  brick-red  precipitate  whicii  suddenly 
falls  to  the  bottom,  and  becomes  dirty-yellow  on  repose ;  remains  sus- 
pended after  agitation. 
Cinchonine  Sulphate :  like  the  last,  but  does  not  fall  down  so  quickly,, 
and  acquires  a  darker  color  when  left  at  rest. — Jour.  Chem.  Soc  ,  1882;. 
from  Gazetta,  1882,  p.  155. 
