506  Gleanings  from  the  German  Journals.  {Am'oSS1!im!lTm" 
a  brown  color,  with  a  solution  of  ammonium  molybdate  in  concentra- 
ted sulphuric  acid,  and  upon  the  immediate  addition  of  a  drop  of 
hydrochloric  acid,  a  blue  color  soon  appears. 
Tincture  of  Jalap  yields  a  residue  turning  red  with  sulphuric  acid. 
Tincture  of  Nujc  Vomica  evaporated  with  dilute  sulphuric  acid  gives 
a  violet  color;  the  residue  treated  with  water,  filtered,  the  fijtrate 
made  alkaline  and  extracted  with  chloroform,  leaves  a  purified  residue 
upon  the  evaporation  of  the  chloroform,  which  with  nitric  acid  is 
colored  red,  or  with  concentrated  sulphuric  acid  and  potassium  bi- 
chromate, assumes  a  violet  color. 
Tincture  of  Quebracho,  5  grams  are  evaporated,  the  residue  dissolved 
in  acidulated  water,  filtered,  rendered  alkaline  with  potassium  hydrate 
and  agitated  with  chloroform ;  the  chloroform  residue  is  colored  blue 
by  sulphuric  acid  and  potassium  bichromate,  or  a  red  color  is  produced 
by  boiling  with  dilute  sulphuric  acid  and  adding  potassium  chlorate.. 
—(Apoth.  Ztg.);  Rundschau,  1889,  714. 
The  behavior  of  chloral  hydrate  toward  glass  is  noticed  by  Ludwig 
Reuter  in  Pharm.  Centralhalle,  1889,  477.  A  blue  glass  bottle  con- 
taining chloral  hydrate  was  sent  him  by  a  colleague;  the  crystals 
adhering  to  the  sides  of  the  bottle  had  an  intense  blue  color.  By  dis- 
solving these  crystals  in  water  and  filtering,  the  coloring  matter  could 
be  separated ;  the  blue  pigment  was  dissolved  by  chloral  hydrate  if 
the  latter  was  melted  by  aid  of  a  water-bath,  but  on  addition  of  water 
was  reprecipitated.  The  chloral  hydrate  obtained  free  from  the  col- 
oring impurity  (found  to  be  due  to  traces  of  nickel,  originally  present 
in  the  smalt  used  in  coloring  the  glass),  answered  all  the  requirements 
of  the  German  Pharmacopoeia,  barring  a  slight  residue  obtained  when 
dissolving  in  ether-alcohol  and  which  residue  was  found  to  consist  of 
formate.  This  mutual  decomposition,  so  accidentally  discovered,  is  of 
sufficient  interest  to  warrant  experiments  made  with  glass  of  various 
kinds. 
Distinctive  tests  for  Acetanilid,  Methacetin  and  Phenacetin. — The 
tests  are  first  given  and  then  the  effect  obtained  by  using  the  above 
substances.  1,  0"1  gm.  with  1  cc.  cold  concentrated  hydrochloric 
acid.  2,  after  observing  the  results  of  test  1,  add  one  drop  of  con- 
centrated nitric  acid.  3,  0*1  gm.  boiled  with  1  cc.  concentrated  hy- 
drochloric acid,  allowed  to  cool,  diluted  with  water  and  3  drops  of  a 
3  per  cent,  chromic  acid  solution  added.  4,  0*1  gm.  with  5-6  cc.  cold 
Concentrated  hydrochloric  acid  and  1  cc.  of  the  3  per  cent,  chromic 
