68 
Gold  Chloride  and  Siker  Nitrate  as  Tests.  { 
Am.  Jour.  Pharm. 
Feb.,  1889. 
Attention  should  be  called  to  the  difference  between  the  poppy-seed 
oils  ;  No.  1  is  an  imported  oil,  Nos.  2  and  3  were  made  from  black 
poppy-seed  by  expression.  The  difference  is  so  great  that  the  oils  were 
possibly  made  from  different  kinds  of  seed,  the  imported  probably 
from  white  poppy-seeds. 
Regarding  these  oils,  some  show  adulteration  :  Almond,  1  with 
arachis  oil ;  almond,  2  with  peach-kernel  oil ;  olive  1,  the  adulterant 
possibly  a  mixture  ;  olive  3,  with  cotton-seed  oil ;  salad,  a  mixture  of 
arachis  and  sesame  oils. 
3.  Commercial  Oils. 
Castor  1  
2  
Croton  ,  
Cod  liver  1  
2  
Fish  (good  sample)  
Neatsfoot  1  
2  
Linseed  1  (cold  pressed) 
"  §:::::=:::::: 
"  4  
Sperm  1  
"  2  
Au  CI3. 
Slight  precipitate  of  gold. 
No  change. 
Red  in  4  minutes. 
Slight  precipitate  of  gold. 
Dark  red  in  20  minutes. 
Red  in  12  minutes. 
No  change. 
Red  in  3  minutes. 
No  change. 
Red  in  5  minutes. 
No  change. 
Ag  N03. 
a,  reddish  ;  b,  fluorescent,  dark  red, 
thick. 
a,  reddish ;  b,  fluorescent,  dark  red, 
thick. 
a,  no  change ;  b,  dark  green,  solid. 
a,  dark  brown  ;  b,  no  change. 
a,  pale  red ;  b,  gray  brown. 
a,  dark  red ;  b,  no  change. 
a,  greenish  ;  b,  solid. 
a,  yellowish ;  b,  brownish,  solid. 
a,  brown  color;  b,  gray  black,  pre- 
cipitate, thick. 
a,  red  brown ;  b,  dark  brown,  thick. 
a,  no  change:  b,  yel.  green,  ppt.  " 
a,  "      "        b,  greenish,  ppt.  " 
a,  brown  ;  b,  no  change, 
c,  light  brown;  b,  green  black,  ppt. 
Finally  a  few  mixtures  of  olive  and  cotton-seed  oils  were  made 
containing  one,  five  and  ten  per  cent,  of  the  latter  oil  and  subjected  to 
the  gold  chloride  test;  the  ten  per  cent,  mixture  gave  on  warming  for 
12  minutes  a  red  color,  very  distinctly ;  the  five  per  cent,  mixture  did 
not  react  in  twenty  minutes  but  if  heated  for  one-half  hour  slowly 
deposited  a  precipitate  of  metallic  gold  ;  the  one  per  cent,  mixture 
showed  no  color  whatever  with  gold  chloride  but  with  silver  nitrate 
gave  a  slight  deposit  on  the  sides  of  the  test  tube.  The  separation  of 
metallic  gold  by  a  number  of  the  oils  is  probably  traceable  to  the 
amount  of  reducing  acid  present  being  insufficient  to  give  the  red  color. 
Aqua  cnloroformi  has  not  only  antiseptic  and  anaesthetic  properties 
(Am.  Jour.  Phar.,  1888,  pp.  408,  475),  but  according  to  Ullrich  (Prag.  Med. 
Wochenschr.,  1888,  JSTo.  33),  is  also  an  effective  haemostatic,  very  useful  in 
bleeding  from  the  gums  after  the  extraction  of  teeth. 
