This section is from the book "Practical Materia Medica And Prescription Writing", by Oscar W. Bethea. Also available from Amazon: Practical Materia Medica and Prescription Writing.
Eng., Mass of Ferrous Carbonate. Synonym, Vallet's Mass. A soft, dark-colored mass containing about 35 per cent. of Ferrous Carbonate.
4 grains (0.25 Gm.).
 
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