AmFreb.?i893arm'}  Abstracts  from  the  French  Journals.  77 
this  extract  are  added  to  95  cc.  boiling  water,  which  keeps  it  in  per- 
fect solution,  even  after  cooling,  and  has  the  same  appearance  as 
that  made  extemporaneously,  while  if  the  liquid  is  added  to  cold 
water,  an  abundant  precipitate  is  produced. — Jour,  de  Phartn.  et  de 
Chim.,  Nov.,  1892. 
Ammonium  chloride  in  the  treatment  of  cholera. — M.  Dumont- 
ipallier,  in  the  name  of  M.  Marotte  (Rev.  de  Ther.}  Nov.,  1892), 
mentions  the  following  advantages  of  the  use  of  this  salt  in  the  treat- 
ment of  cholera :  it  produces  a  return  of  warmth  and  perspiration^ 
also  augments  diuresis;  one  is  justified  in  believing  that  it  shows  a 
way  for  the  elimination  of  the  toxic  elements  of  this  disease.  The 
medicament  should  be  prescribed  in  doses  proportionate  to  the 
intensity  of  the  disease,  and  the  rapidity  of  the  attacks  in  cachets 
or  in  liquid  form.  In  addition  to  the  medicament,  a  mustard  bath 
is  of  advantage. 
Preparation  of  gold  bromide.— Ch.  Patrouillard  uses  the  following 
process : 
Trichloride  of  gold,  1  gm.;  potassium  bromide,  1  gm.;  diluted  pure 
sulphuric  acid  (1  : 10),  4*50  gm.,  and  distilled  water,  q.  s.  On  warm- 
ing, this  mixture  it  shows  a  very  dark  rose  color,  due  to  the  produc- 
tion of  gold  bromide.  At  a  slightly  elevated  temperature,  the  reac- 
tion is  complete  in  a  few  moments.  Allow  the  solution  to  cool  and 
agitate  several  times  with  about  10  ccm.  of  ether ;  when  the 
aqueous  solution  will  be  nearly  entirely  decolorized. 
Agitate  the  mixed  ethereal  solutions  with  a  little  pure  basic  cal- 
cium chloride  ;  decant  carefully  and  evaporate  tl*e  ether.  Dehydra- 
tion is  necessary  in  order  to  obtain  the  final  product  pure.  If  any 
water  was  still  retained  by  the  ether,  desiccate  at  an  elevated  tem- 
perature, when  a  portion  of  the  bromide  is  decomposed.  By  evapo- 
rating on  a  heated  tile,  the  ethereal  solution  does  not  rise  to  the 
edge  of  the  container,  and  the  loss  is  avoided  which  is  always  expe- 
rienced by  heating  on  a  water-bath. — Soc.  Pliarm.  dc  V Eure,  1892. 
The  crystalline  substance  present  in  cork. — According  to  M.  Kiigler 
(L  Union  pharm.,  Nov.  30,  1892,  p.  524),  the  crystalline  substance 
which  Istrati  {U  Union,  p.  450)  extracted  from  cork  is  identical 
with  that  extracted  by  him  from  the  same  substance  in  1884  (see 
Amer.  Jour.  Phar.,  1884,  p.  240).  Kiigler  reserved  for  this  body 
the  name  cerin,  previously  proposed  by  Hohnel,  he  having  micro- 
