42 F. Storer on the Carbonates of Lime and Baryta. 
forms on boiling, but if the lime water be much diluted no pre- 
yo oat will occur even on actual ebullition, although solutions 
the alkaline carbonates produce at once precipitates. ; 
Tf to the lime water in which carbonic acid gas has produced 
no precipitate even after boiling, a dilute solution of caustic — 
mmonia or lime be added and the mixture heated, a pre- | 
water which has been exposed to the air, as when kept in bottles 
_ with loosely fitting stoppers, affords an abundant precipitate of 
int the appearance of rectangular plates, while those of ear 
its indisposition to separate from the water. Moreo 
e@ actions of carbonic acid gas on solutions of caustic lime 
or baryta when mixed with dilute solutions of the caustie alka 
‘may be mentioned here as it seems to be connected W 
that where water alone is present. . 
