Seated in the left center is the alchemist holding up a flask while looking at manuscripts that rest on a tapestry-covered table. A man holding a vessel, a woman, and another person watch the alchemist state the diagnosis. To the far right of a globe and vessels is a young assistant working the bellows. In the background is a group of men watching a dental procedure.
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Merck litmus paper, 1934
©2010 Chemical Heritage Foundation