This section of the book is from "The Complete Herbalist" by Dr. O. Phelps Brown. Also available from Amazon: The Complete Herbalist: The People Their Own Physicians By The Use Of Nature's Remedies.
Two forms of heart-burn are commonly observed: one, attended by acid eructations, causing irritation of the throat and fauces; and in the other, the ejections from the stomach are rancid and alkaline, and connected with a gnawing pain and distention of the stomach. It principally occurs during digestion, and may be of every grade of severity. It is caused by excess of acid, or an accumulation of gas, in the stomach.
TREATMENT. -- This depends upon the cause. If acid, administer pulverized charcoal, with a little magnesia, or, what is just as good, compound spirits of lavender. If alkaline, give lemon-juice as often as required.