Hemp; leaves; buds and root. Coloured copper engraving; based on an illustration by Gotttlieb Tobias Wilhelm (1758-1811); from the encyclopedie of natural history; Vienna (Austria); 1816. Cannabis plant with leaves; buds and roots. Cannabis sativa. Handcolored copperplate engraving from G. T. Wilhelms ?œâ€?Unterhaltungen aus der Naturgeschichte?â€?(Encyclopedia of Natural History) 1820. Gottlieb Tobias Wilhelm (1758-1811) was a Bavarian clergy and naturalist in Augsburg; where the first edition was published.