Am.  )our.  Pnarm.  ( 
Nov.,  1878.  J 
Varieties. 
551 
Some  Reactions  with  Lindo's  Test  for  some  of  the  Bases  in  Opium. 
By  How. — The  following  reactions  are  obtained  by  Lindo's  reaction  with  sulphuric 
acid  and  ferric  chloride  ("  Chem.  News,"  xxxvii,  158,  and  this  vol.,  p.  678) : 
Papaverina  dissolves  in  sulphuric  acid  to  a  pale  purple  fluid,  which  becomes  very- 
pale  and  then  brownish  on  standing  about  an  hour.  The  addition  of  ferric  chloride 
and  warming  cause  the  purple  color  to  change  quickly  to  yellow,  while  the  liquid 
becomes  turbid  ;  the  addition  of  water  gives  a  colorless  liquid,  becoming  pale  yellow 
next  day. 
Narcotina  dissolves  to  a  bright  yellow  liquid,  becoming  orange  .on  standing  about 
an  hour ;  then  treated  as  above,  a  blood-red  is  produced,  soon  assuming  a  purplish, 
tinge,  then  a  bright  red,  resembling  ferric  thiocyanate,  and  remaining  permanent  at 
least  for  a  fortnight. 
Cotarnina  gives  first  a  clear,  dark  brownish-yellow  solution  ;  then,  with  ferric 
chloride,  a  whitish  precipitate,  dissolving  to  a  dark  red  liquid,  which  with  water 
assumes  much  of  the  color  obtained  with  narcotina,  but  perhaps  paler.  It  is  equally 
permanent. 
Narceina  dissolves  to  an  orange  liquid,  which  becomes  turbid  and  purplish,  and 
finally  of  a  pale  red  color. 
Strychnia  dissolves  to  a  colorless  liquid,  and  affords  successively  a  clear  yellow 
and  a  colorless  liquid. 
Brucia  gives  first  a  pale  amethystine  solution,  then  orange-yellow  or  red-yellow 
looking  across  the  tube,  and  red  on  looking  down  it ;  on  further  solution  an. 
amethystine  red,  becoming  pale,  but  still  distinct,  at  the  end  of  a  fortnight. 
CafTeina  gives  successively  a  colorless,  a  bright  yellow,  and  a  colorless  fluid. 
Piperina  dissolves  to  a  deep  red,  nearly  black  liquid,  with  a  flocculent  deposit  oa 
heating  with  ferric  chloride  ;  the  addition  of  water  gives  a  yellow  liquid,  the  deposit 
appearing  dark  brown  5  the  liquid  was  nearly  colorless  the  next  morning. 
Betulin  gives  a  dirty  green-brown  liquid,  becoming  clear  and  colorless  with 
water. 
Coumarin  gives  an  orange-yellow  clear  liquid,  which  water  renders  very  pale 
yellow. 
Phloridzin  (from  bark  of  stem  and  roots  of  the  apple  tree)  dissolves  to  a  blood- 
red  liquid,  which  is  orange-colored  at  first,  if  very  little  of  the  substances  is  used  : 
water  gives  a  small  flocculent  precipitate,  and  leaves  the  solution  of  an  orange 
color. 
Quinia  sulphate  of  commerce  dissolves  to  a  pale  yellow  liquid,  which  turns  deeper 
yellow  when  warmed  with  ferric  chloride,  and  colorless  with  water. 
Cinchonia,  impure,  gives  clear  yellow,  turbid  yellow,  and  yellowish  liquids. 
Bebeerina  sulphate,  in  brown  scales,  dissolves  to  a  very  dark  liquid,  becoming  red 
with  more  sulphuric  acid  ;  with  ferric  chloride  and  warming,  a  dark  green  liquid — 
as  seen  over  white  paper — is  produced,  which  gives  with  water  a  dirty  yellow  liquid 
— Ibid.,  October,  1878,  from  Chem.  News,  xxxvii,  244. 
Euphorbone.  By  O.  Hesse. — Euphorbone  was  obtained  from  euphorbium  by- 
extracting  with   petroleum  ether,  and  allowing  the  solution  to  evaporate  spoft- 
