American Medicinal Plants: An Illustrated and Descriptive Guide to Plants Indigenous to and Naturalized in the United States which are Used in Medicine - by Charles Millspaugh, 1892
He gives some details about the preparation. It uses chopped roots in alcohol, left to steep in a cool, dark place for 8 days. Pages 70-75.
American Medicinal Plants: An Illustrated and Descriptive Guide to Plants Indigenous to and Naturalized in the United States which are Used in Medicine - by Charles Millspaugh, 1892
He gives some details about the preparation. It uses chopped roots in alcohol, left to steep in a cool, dark place for 8 days. Pages 70-75.