Doctrine of signatures: (above) a plant resembling the fangs of a viper, above, and (below) a viper. Coloured ink drawing, c. 1923, after G.B. Della Porta.

    • Porta, Giambattista della, approximately 1535-1615.
    Date:
    1923
    Reference:
    524731i

    Licence: In copyright

    Credit: Doctrine of signatures: (above) a plant resembling the fangs of a viper, above, and (below) a viper. Coloured ink drawing, c. 1923, after G.B. Della Porta. Wellcome Collection. Source: Wellcome Collection.

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