Distinguished British men of science 1807-1808 assembled in the library of the Royal Institution, London. Mezzotint by W.… https://www.rawpixel.com/image/13975701/image-person-art-clothingFree Image from public domain licenseJohn Heaviside. Mezzotint by R. Earlom, 1803, after J. Zoffany. https://www.rawpixel.com/image/13991132/john-heaviside-mezzotint-earlom-1803-after-zoffanyFree Image from public domain licenseThe monument to John Playfair on Calton Hill, Edinburgh. Line engraving by W. H. Lizars, 1828, after H. Lizars. https://www.rawpixel.com/image/13974307/image-dog-cloud-personFree Image from public domain licenseJohn Heaviside. Coloured mezzotint by R. Earlom, 1803, after J. Zoffany. https://www.rawpixel.com/image/13978316/john-heaviside-coloured-mezzotint-earlom-1803-after-zoffanyFree Image from public domain licenseDistinguished British men of science 1807-1808 assembled in the library of the Royal Institution, London. Mezzotint by W.… https://www.rawpixel.com/image/13981199/image-person-art-clothingFree Image from public domain licenseJohn Heaviside. Coloured mezzotint by R. Earlom, 1803, after J. Zoffany. https://www.rawpixel.com/image/13987379/john-heaviside-coloured-mezzotint-earlom-1803-after-zoffanyFree Image from public domain licenseThe distinguished men of science 1807-8: a key to the identities of the sitters. Photograph of engraving by W. Walker, 1862… https://www.rawpixel.com/image/14011458/image-cartoon-face-personFree Image from public domain licenseJohn Heaviside. Stipple engraving by J. Cochran, 1847, after Sir W. Beechey. https://www.rawpixel.com/image/14012141/john-heaviside-stipple-engraving-cochran-1847-after-sir-beecheyFree Image from public domain licenseJohn Heaviside. Mezzotint by W. Say, 1803, after Sir W. Beechey. https://www.rawpixel.com/image/14019844/john-heaviside-mezzotint-say-1803-after-sir-beecheyFree Image from public domain licenseJohn Heaviside. Soft-ground etching by W. Daniell after G. Dance. https://www.rawpixel.com/image/14020557/john-heaviside-soft-ground-etching-daniell-after-danceFree Image from public domain license