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.
Abies Nigra, or Black Spruce, is of too irritating a character to use in large doses, although its action is along similar lines to the hemlock spruce. In small doses (@ I to 3 I, well diluted) it is useful in the atonic dyspeptic troubles of the aged. It should not be given to children. It is sometimes of use in constipation due to deficient peristalsis.