Am'/a0Zyi£oarm"}       Incompatibility  in  Prescriptions.  3 
An  important  feature  about  which  there  seems  to  be  some  difficulty 
in  remembering  is  the  solubilities  and  insolubilities  of  inorganic  com- 
pounds. To  make  such  knowledge  readily  accessible,  a  modified 
table  was  framed,  based  almost  wholly  upon  Prof.  Attfield's  "State- 
ment of  the  Solubilities  and  Insolubilities  of  Salts,"  which  expresses, 
directly  or  by  inference,  nearly  500  soluble  and  insoluble  com- 
pounds of  the  following  inorganic  basylous  radicals :.  aluminium, 
ammonium,  antimony,  barium,  bismuth,  cadmium,  calcium,  chromium, 
cobalt,  copper,  ferric,  ferrous,  gold,  lead,  lithium,  magnesium,  manga- 
nese, mercuric,  mercurous,  nickel,  potassium,  silver,  sodium,  stannic, 
stannous,  strontium  and  zinc. 
In  using  this  table,  it  is  only  needful  to  remember  the  well-known 
chemical  law :  that  when  a  solution  of  a  compound  is  brought  in  con- 
tact with  a  solution  of  another  compound,  and,  by  an  interchange  of 
radicals,  an  insoluble  compound  is  rendered  possible,  that  compound 
will  be  precipitated. 
Acetates  are  soluble. 
Arseniates  are  insoluble,  except  those  of  the  alkali  metals. 
Arsenites  are  insoluble,  except  those  of  the  alkali  metals. 
Bromides  are  soluble,  except  mercurous  and  silver ;  those  of  anti 
mony  and  bismuth  are  decomposed  by  water  to  form  oxysalts. 
Carbonates  are  insoluble,  except  those  of  the  alkali  metals. 
Chlorides  are  soluble,  except  those  of  lead  (s),  mercurous  and 
silver. 
Citrates  are  soluble,  except  those  of  manganese,  mercurous,  silver 
and  strontium,  aluminium  (s),  barium  (s),  bismuth  (s),  cadmium  (s), 
calcium  (s),  lead  (s),  zinc  (s). 
Cyanides  are  insoluble,  except  the  mercuric  and  those  of  the  alka- 
line metals  and  earths. 
Hydrates  are  insoluble,  except  those  of  barium,  strontium,  cal- 
cium (s)  and  lead  (s)  and  the  alkali  metals. 
Iodides  are  soluble,  except  those  of  antimony,  bismuth,  gold, 
lead  (,s),  mercuric,  mercurous,  platinum  (s)  and  silver. 
Nitrates  are  soluble. 
Oxalates  are  insoluble,  except  those  of  antimony  (s),  chromium, 
ferric  (s),  ferrous  (s),  stannic,  and  the  alkali  metals. 
Oxides  are  insoluble,  except  those  of  barium,  strontium,  calcium  (s), 
and  the  alkaline  metals. 
(s)  means  sparingly  soluble. 
