Advertisement for Chocolat Guérin-Boutron, a French chocolate brand founded in 1775. This card is part of a series called, "the Benefits of umanite," consisting of 84 portraits featuring men and women who have acted for the good of humanity. Card features a portrait of Koch and a vignette showing a scene in India of Dr. Koch and others where he studied cholera.
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The National Library of Medicine believes this item to be in the public domain. (More information)