404 
GLEANINGS  FROM  THE  GEE-MAN  JOFRNALS^ 
the  cyanide,  yields  anilin,  and  alcohol  under  a  like  condition, 
ethylamin.— (Buchn,  N.  Rep.  x.  131,  132.) 
To  prevent  mistaking  Strychnia  for  Santonin^  Dr.  Henkel,  of 
Tubingen,  suggests  to  use  in  medicine  only  such  santonin  which 
has  turned  yellow  in  contact  with  the  light ;  he  believes  it  to 
have  the  same  properties  as  the  unchanged.— (^Buch.  IN.  Repert. 
X.  132.) 
Pure  Carbonate  of  Soda  is  prepared  by  F.  F.  Jordan,  of 
Cronstadt,  Russia,  by  granulating  sal  sodge  twice,  allowing  the 
mother  liquor  to  drop  off  upon  a  funnel,  washing  the  crystalline 
mass  with  a  little  cold  water,  and  finally,  slowly  with  alcohol, 
until  this  ceases  to  take  up  table  salt ;  the  residue  may  be  re- 
crystallized. — (Buchn.  N.  Rep,  x.  133.) 
Salep. — Prof.  Buchner  states  that  C. W.  Barnickel,  pharmaceu- 
tist in  Remlingen,  near  Wurzburg,  prepares  a  very  excellent 
salep  from  several  species  of  Orchis,  by  digging  the  tubers,  after 
the  plants  have  been  in  fiower,  dipping  them  in  boiling  water, 
to  remove  the  brown  epidermis,  and  then  drying  the  tubers  care- 
fully and  rapidly  upon  hot  sheet  iron  stoves. -—(Buchn.  N.  Rep, 
X.  134.) 
Test  for  Sulphurous  Aeid.—Th.Q  acid  is  to  be  tested  in  neutral 
solution.  Prof.  Boedecker  prepares  the  test  liquid  by  mixing  a 
considerable  quantity  of  solution  of  sulphate  of  zinc  with  very 
little  nitroprusside  of  sodium  ;  this  produces  in  a  solution  of  a 
sulphite  a  rose  or  dark  red  coloration,  increasing  in  intensity  by 
a  little  ferrocyanide  of  potassium,  by  which  a  beautiful  purple 
precipitate  will  appear,  if  the  quantities  are  not  too  minute. 
Acids  and  alkalies  prevent  the  reaction  ;  bicarbonate  of  soda  is 
without  effect  (Ann.  d.  Ch.  und  Pharm.  xli.  193-195.) 
Volwnetric  estimation  of  Phosphoric  Acid  and  Arsenic  Boe- 
decker prepares  the  uranic  nitrate,  already  proposed  as  a  test 
by  Leconte,  by  dissolving  20-2817  grm.  of  pure  dry  uranic  oxid^ 
iiffl .nitric  acid,  and  sufiBcient  water  to  make  one  litre;  each  cub. 
€.  m.  requires  5  milligr.  PO^  for  complete  precipitation.  Besides 
the  alkalies,  no  base  but  lime,  baryta,  strontia,  magnesia  and 
oxide  of  zinc  may  be  present.    The  solution  is  first  mixed  with 
