This section is from the book "A Text-Book Of Pharmacology, Therapeutics And Materia Medica", by T. Lauder Brunton. Also available from Amazon: A text-book of pharmacology, therapeutics and materia medica.
Boil the logwood in the water for ten minutes in a covered vessel, adding the cinnamon towards the end. Strain the decoction, and pour as much distilled water over the contents of the strainer as will make the strained product measure a pint.
Uses. - It is a useful astringent in diarrhoea, especially in children. Its great disadvantage is the stain which it imparts to clothing. For the diarrhoea of phthisis, decoctum haematoxyli with acidum sulphuricum aromaticum is a good prescription. It is also used in dysentery and in atonic dyspepsia.