An allegory of learning: boys learn to read, write, and calculate in the foreground, in the middleground an elderly man uses dividers on a globe, in the background men take books from shelves. Engraving, 1756.

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An allegory of learning: boys learn to read, write, and calculate in the foreground, in the middleground an elderly man uses dividers on a globe, in the background men take books from shelves. Engraving, 1756. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.