Nicolas Louis de La Caille. Line engraving by Thérèse Devaux after Mlle Le Jeuneux. https://www.rawpixel.com/image/13998773/image-cartoon-face-personFree Image from public domain licenseGeorges-Léopold-Chrétien-Frédéric-Dagobert, Baron Cuvier. Line engraving by G. T. Doo, 1840, after H. W. Pickersgill, 1831. https://www.rawpixel.com/image/13975755/image-face-frame-personFree Image from public domain licenseRobert Boyle. Line engraving by G. Vertue, 1738 after J. Kerseboom. https://www.rawpixel.com/image/14021848/robert-boyle-line-engraving-vertue-1738-after-kerseboomFree Image from public domain licenseAdolphus Vorstius. Line engraving by P. Pontius after G. Petri. https://www.rawpixel.com/image/13981829/adolphus-vorstius-line-engraving-pontius-after-petriFree Image from public domain licenseRobert Gooch. Line engraving by J. Linnell, 1831, after himself, 1827. https://www.rawpixel.com/image/13974261/robert-gooch-line-engraving-linnell-1831-after-himself-1827Free Image from public domain licenseNicolas Louis Vauquelin. Line engraving by F. J. Dequevauviller fils after C. J. Besselièvre. https://www.rawpixel.com/image/14003083/image-face-person-artFree Image from public domain licensePietro Andrea Mattioli. Line engraving by C. Faucci after L. Feliciati. https://www.rawpixel.com/image/14017105/pietro-andrea-mattioli-line-engraving-faucci-after-feliciatiFree Image from public domain licenseGuillaume, Baron Dupuytren. Line engraving by A. Martinet after himself. https://www.rawpixel.com/image/13973781/guillaume-baron-dupuytren-line-engraving-martinet-after-himselfFree Image from public domain licenseRobert Brown. Line engraving by C. Fox, 1837, after H. W. 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