Samuel Thomson’s multi-level marketing system made his botanical cures especially popular and profitable in the first half of the nineteenth century. Subscribers to his system could purchase the medicines for their own use as well as become agents to sell his books and products.
Courtesy of U. S. National Library of Medicine
Image featured in Discovering Quacks, Utopias, and Cemeteries: Modern Lessons from Historical Themes by Cynthia Resor