Am'ju<iyr'i9Pi4arm"}      Bichloride  of  Mercury  Tablets.  315 
Perchloride,  or  Corrosive  Sublimate,  Tablets,"  it  directed  a  mixture 
of  equal  parts  of  mercuric  chloride  and  sodium  chloride  colored  with 
methyl  violet  to  be  compressed  into  tablets  containing  8.75  grains  of 
the  mercuric  chloride,  so  that  one  dissolved  in  the  imperial  pint 
(20  fl.  ozs.)  of  water  will  make  a  1/10  per  cent.  (1  in  1000)  solution 
of  mercuric  chloride.  Under  the  title  "  Solvellse  Hydrargyri  Per- 
chloridi  Fortes  or  Strong  Soluble  Mercuric  Chloride  Tablets," 
a  tablet  of  the  same  percentage  of  essential  ingredients,  but  double 
the  weight,  was  directed  so  that  one  dissolved  in  20  fluidounces  of 
water  makes  1/5  per  cent.  (1  in  500)  of  mercuric  chloride.  Other 
formulas  are  given  for  a  "  mild  "  and  for  a  "  small  "  soluble  mercuric 
chloride  tablet  yielding,  when  dissolved  as  directed,  solutions  1  in 
4000  and  1  in  4500,  the  latter  being  especially  recommended  as  suit- 
able for  ophthalmic  purposes. 
The  French  Pharmacopoeia  (1908)  presents  a  new  style  of 
formula*  for  use  of  mercuric  chloride  in  antiseptic  solution.  Its 
formula  for  Papier  au  Chlorure  Mercurique  or  Charta  hydrargyri 
bichlorati  directs  that  5  Gm.  each  of  mercuric  chloride  and  sodium 
chloride  be  dissolved  in  a  sufficient  quantity  of  distilled  water  to 
obtain  a  volume  of  20  c.c.  Filter-paper  purified  by  treating  with 
water  containing  one  part  of  hydrochloric  acid  to  the  thousand, 
washing  with  pure  water  and  drying,  is  then  saturated  with  the 
mercuric  chloride  solution  so  that  each  rectangular  surface  5  cm. 
by  10  cm.  shall  imbibe  1  c.c.  of  the  solution  and  represent  25  eg.  of 
mercuric  chloride.  The  superscription,  "  Corrosive  Sublimate " 
"  twenty-five  centigrammes,"  is  directed  to  be  printed  with  indigo 
carmine,  thus  producing,  when  immersed  in  the  proper  volume  of 
water,  a  blue  solution.  The  paper  is  to  be  protected  from  light 
and  moisture  and  the  container  to  be  labelled  in  indelible  red  letters 
b  POISON." 
These  specifications  of  the  Pharmacopee  Francaise,  official  in 
that  country  since  July  17,  1908,  will  yield  a  product  essentially  the 
same  as  the  corrosive  sublimate  leaflets  now  being  made  by  an 
American  manufacturer  who  claims  originality  and  the  right  to  a 
patent  thereon  as  a  new  and  novel  invention. 
The  Italian  Pharmacopoeia  (1909)  gives  the  title  "  Pastiglie  di 
Cloruro  Mercurico  "  with  the  latin  Pastilli  bichlorureti  hydrargyri. 
Its  formula  is  mercuric  chloride  and  sodium  chloride  equal  parts 
colored  with  an  aqueous  solution  of  eosin  and  compressed  into  cir- 
cular pastilles  of  1  or  2  grammes  in  weight. 
