This section is from the book "A Practitioner's Handbook Of Materia Medica And Therapeutics", by Thos. S. Blair. Also available from Amazon: A Practitioner's handbook of Materia Medica and Therapeutics.
Rubus, Blackberry. The fluidextract of the bark of the root is an agreeable tonic astringent, in 10 to 30 I. doses, in syrup or elixir. Its field is in the diarrheas of infancy marked by large, watery discharges of a clay color. An infusion of the fresh root is quite effective.