Characters. - A granular powder which effervesces on the addition of water.

Dose. - 60 grains to 1/4-ounce.

Use. - If absorbed there may be some slight difference between the effect of this salt and of tartarated soda, which contains some potash, but this is very slight, and of no importance. It is used only for its laxative effect. It is both pleasanter to take than tartarated soda, and it is less likely to cause unpleasant feelings in the stomach.