348 
Analysis  of  a  Silver  Ore. 
{Am.  Joub.  Pharm. 
Aug,  1, 1871. 
bulk  of  sulphufic  ether,  evaporated  and  left  |  grain  of  corrosive  sub- 
limate. 
When  chloride  of  sodium  is  used  in  place  of  muriate  of  ammonia, 
the  calomel  does  not  so  readily  become  converted  into  bi-chloride, 
but  requires  a  higher  temperature.  At  110°F.  no  change  takes  place, 
but  when  kept  at  120°F.  for  twelve  hours,  the  calomel  becomes  very 
slowly  converted  into  bi-chloride.  The  addition  of  twenty  drops  of 
muriatic  acid  to  the  quantity  used,  seems  to  hasten  the  reaction. 
Calomel  digested  alone  with  muriatic  acid  for  (12)  twelve  hours,  at  a 
temperature  of  120°F.  undergoes  the  same  change,  but  is  not  affected 
at  a  lower  temperature.  With  nitro-muriatic  acid  the  change  takes 
place  spontaneously  and  without  any  elevation  of  temperature  ;  rais- 
ing the  temperature  to  110°F.  does  not  appear  to  hasten  the  reaction. 
ANALYSIS  OP  A  SILVER  ORE. 
By  John  L.  Beeler. 
(From  the  Author's  Inaugural  Essay.) 
At  the  suggestion  of  Dr.  F.  A.  Genth,  with  whom  I  was  studying 
analytical  chemistry,  I  made  an  examination  of  a  silver  ore  which  he 
had  received  from  near  Austin,  Nevada. 
From  the  peculiar  waxy  character  of  some  portions  of  the  surface 
of  the  mass,  I  was  led  to  the  conclusion  that  it  contained  some  little 
horn  silver,  and  a  preliminary  examination  revealed  the  presence  of 
a  small  quantity  of  chloride  of  silver,  together  with  the  sulphides  of 
silver,  antimony,  lead,  copper  and  iron  with  some  quartz. 
For  a  quantitative  analysis,  I  took  one  grm.  of  the  finely  powdered 
ore  and  fused  with  3 — 4  parts  each  of  sulphur  and  carbonate  of  soda. 
I  dissolved  out  the  soluble  sulphides  of  antimony  and  sodium,  by  boil- 
ing with  water  in  a  small  evaporating  dish,  and  filtered  to  collect  the 
insoluble  residue.  I  precipitated  the  SbSg  by  HCI,  filtered,  washed 
thoroughly  and  oxidized  by  NO^,  estimating  the  antimony  as  SbO^= 
•1022     -0809  Sb. 
I  dissolved  the  insoluble  sulphides,  &c.,  in  NO^  and  filtered  to  sepa- 
rate the  silica.  Reserved  the  NO^  solution,  and  as  it  appeared  that 
the  silica  had  retained  a  little  silver,  I  reduced  this  by  caustic  soda 
and  grape  sugar,  filtered  and  washed  out  the  soda  by  addition  of  a 
little  Ac,  then  thoroughly  with  water. 
