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.
Dose. - Not more than 1/20 grain at first.
Uses. - Its action is similar to that of phosphorus, and it is used in place of it. Each grain contains nearly 1/4 grain of phosphorus.