This section is from the book "A Manual of Materia Medica and Pharmacology", by David M. R. Culbreth. Also available from Amazon: Manual of Materia Medica and Pharmacology.
Guaiacum Angustifo'Lium. S. Texas, Mexico. Wood hard, heavy, splitting irregularly, yellowish-brown. Sometimes substituted for that which formerly was official.
 
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