166  Therapeutical  Value  of  Ape-morphia .  {AMAp^i8T3.M" 
REACTIONS  OF  APOMORPHIA.* 
By  Max  Quehl  and  H.  Koehler. 
Besides  the  reactions  noticed  before  by  Matthiessen  and  Wright, 
the  authors  observed  the  following,  produced  in  solutions  of  apomor- 
phia : 
1.  Sulphocyanide  of  potassium  gives  a  white  curdy  voluminous 
precipitate,  which  dissolves  on  heating. 
2.  Ferrocyanide  of  potassium  changes  the  solution  to  reddish-yel- 
low, finely  flocculent,  opalescent ;  on  boiling,  the  precipitate  becomes 
more  apparent,  cake-like,  and  assumes  a  leek-green  color. 
3.  Ferricyanide  of  potassium  yields  a  white  curdy  precipitate,  inso 
luble  on  boiling,  but  turning  violet-blackish. 
4.  Tannin  produces  a  yellow-greenish  precipitate,  insoluble  on  boil- 
ing, but  separating  afterwards  slowly  in  larger  floccules. 
5.  Chloride  of  gold  gives  a  purple  precipitate,  resembling  the  one 
produced  with  tin  salt ;  it  is  soluble  in  much  water  and  acquires,  on 
boiling,  a  darker  brown-red  shade. 
6.  Nitropicric  acid  precipitates  solutions,  even  when  largely  diluted, 
lemon-yellow ;  the  voluminous  precipitate  dissolves  on  boiling. 
7.  Sulphate  of  copper  renders  the  liquid  turbid  and  blueish-white, 
changing  to  sap-green  on  boiling. 
8.  With  iodine  in  iodide  of  potassium  a  blood-red  precipitate  occurs, 
disappearing  on  boiling. 
9.  Stannous  chloride  yields  a  white  precipitate,  soluble  on  heating. 
10.  Chloride  of  zinc  produces  a  light  precipitate,  readily  disap- 
pearing on  boiling. 
11.  Basic  acetate  of  lead  renders  the  solution  gradually  turbid  and 
greenish. 
12.  Arsenious  acid  produces  a  greenish  turbidity,  but  no  precipi- 
tate. 
13.  Acetate  of  baryta  yields  at  first  a  slight  whitish  turbidity ; 
after  awhile  a  greenish  sediment. 
THERAPEUTICAL  VALUE  OF  APOMORPHIA.f 
As  the  histories  show,  the  subcutaneous  introduction  of  apomorphia, 
both  in  the  dog  and  cat,  has  always  given  a  positive  result,  and  in 
*  M.  Quehl,  Studien  iiber  Apomorphin.    Translated  from  Neues  Jahrbuch 
fiir  Pharmacie,  1873,  Jan. 
t  Glasgow  Medical  Journal. 
