606  Medicinal  Lithium  Carbonate.  {^ecSsT 
The  aqueous  solution  has  an  alkaline  reaction  upon  litmus  paper. 
One  gramme  dissolved  in  50  c.c.  of  dilute  acetic  acid  should  at 
most  leave  only  a  trace  of  insoluble  matter  (limit  of  mechanical  im- 
purities). Separate  portions  of  this  solution  should  not  be  affected 
by:  hydrogen  sulphide,  T.  S.  (absence  of  arsenic,  lead,  etc.);  ammo- 
nium oxalate,  T.  S.  (absence  of  calchun),  or  sodium  cobaltic  nitrite, 
T.  S.  (limit  of  potassium);  or  produce  more  than  a  faint  opalescence 
with  silver  nitrate  T.  S.  (limit  of  chloride);  barium  chloride  T.  S. 
(limit  of  sulphate);  or  more  than  a  slight  coloration  with  ammonium 
sulphide  T.  S.  (limit  of  iron,  manganese,  etc.). 
If  05  gramme  of  Lithium  Carbonate  be  dissolved  in  2  c.c.  of 
hydrochloric  acid  and  the  clear  solution  evaporated  to  dryness,  the 
dry  residue  should  dissolve  completely  in  3  c.c.  of  absolute  alcohol, 
and  3  c.c.  of  ether  added  to  this  solution  should  not  render  it  turbid 
(limit  of  other  alkalies). 
If  1  gramme  of  the  dry  salt  be  mixed  with  25  c.c.  of  water,  to 
which  have  been  added  a  few  drops  of  methyl-grange  solution,  it 
should  require  not  less  than  267  c.c.  of  normal  sulphuric  acid,  cor- 
responding to  at  least  98-61  per  cent,  of  the  pure  salt. 
LITERATURE. 
1  1875.  A.  W.  Hofmann's  Bericht  uber  die  Entwickelung  der  Chem. 
Industrie,  Band  III,  Abtheilung,  1,  1014. 
2  1864.   Jour.  J.  ptakt.  Chem.,  93,  275. 
3  1855.    Ann,  de  chim.  et  de phys.,  3,  45,  350. 
4  1876.    F.  Filsinger,  Ding.  Poly.  Jour.,  222,  271  and  385. 
1888.    Iveadenburg's  Handworterbuch  der  Chemie,  6,  509. 
1896.  Encyklopddisches  Handbuch  der  Tecknischen  Chemie,  by  F.  Stoh- 
mann  and  B.  Kerl,  Vierte  Auflage,  5,  774. 
1897.  Thorpe's  Dictionary  oj  Applied  Chemistry,  2,  467. 
5  1856.    Pogg.  Ann.,  97,  1  and  99,  25. 
6  1857.  Ann.  de  chim.  etdephys.,  (3),  5/,  103  and  Gmelin-Kraut  (1886)  II, 
/,  421. 
7  1887.    Pharm.  Chemie,  1,  585. 
8  1887.    Chem.  News,  55,  169. 
!'  1884.  Jour,  der  russ.  phys'.-chem.  Ges.,  1,  591  ;  Abts.  Ber.  d.  chem.  Ges.y 
17,  406. 
10  1887.    Arch,  der  Pharm.,  (3),  25,  509. 
11  1885.    Arch,  der  Pharm.  (3),  23,  591  ;  Pharm.  Ztg.  No.  55. 
35  Poplar  Street,  Philadelphia,  Pa.  • 
Rhus  Poisoning  may  be  treated  successfully  by  an  application  of  ammonium 
muriate  :  1  ounce  to  be  dissolved  in  two  quarts  of  warm  water.  The  solution  is 
to  be  applied  on  cloth  or  absorbent  cotton,  covered  with  oil  silk  or  rubber  tissue. 
—A.  T.  Hudson,  in  N.  Y.  Med.  Pee. 
