Compounds with the salts of ammo 
Ff’. H. Storer on the Carbonates of Lime and Baryta. 45 
may not have a sufficient time to form. This'is readily accom- 
plished by swinging rapidly the vessel containing the solution of 
the lime or baryta salt and suddenly turning into it the solution 
of the alkaline carbonate. If the solutions have been used in 
proper proportion no trace of a precipitate will appear, owing to 
the complete mixture obtained by this method of experimenting, 
although a fractional amount of the lime salt used would have 
for the carbonates of the alkaline earths is sufficient to retain the 
tter in solution until heat is applied. ese 
e well known fact that a current of carbonic acid gas pro- 
Auees no immediate fab ee in a solution of a salt of lime or 
of baryta neutralized by ammonia seems to depend on a mixed 
action: in part, like that previously alluded to, which prevents 
Nic acid gas is passed through dilute baryta water, and a 
on the tendency of the carbonates of lime and baryta to form 
the precipitation of carbonate of baryta when a current of car- 
bias 
lime may be substituted for caustic ammonia in the a 
mixture with like result, no precipitate appearing until after 
the lapse of considerable time unless the solution be heated, 
‘fe action of the fixed alkali being, to all appearance, en- 
nia. 
I find that a weak solution of caustic soda, potash or tes 
v 
+ 
