This section is from the book "Materia Medica And Therapeutics Inorganic Substances", by Charles D. F. Phillips. Also available from Amazon: Materia medica and therapeutics.
Inhalations of carbonic acid are indicated in certain irritative forms of pulmonary phthisis, as likely to diminish active erethism and slow the progress of destruction (Withering, Beddoes, etc.). The air of stables is said to be beneficial partly for this reason.
 
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