Yellow fever: section of brain of a patient infected with yellow fever. Photograph, 1900/1920 . https://www.rawpixel.com/image/14009092/photo-image-background-frame-artFree Image from public domain licenseWilliam Pryce. Line engraving by J. Basire, 1778, after Clifford. https://www.rawpixel.com/image/14020551/william-pryce-line-engraving-basire-1778-after-cliffordFree Image from public domain licenseCathedral Rocks from the Point, Ausable Chasm, No. 1155 from the series "Crystal" by Seneca Ray Stoddard https://www.rawpixel.com/image/9031626/photo-image-person-nature-archFree Image from public domain licenseA ruined cottage by a lakeside. Etching after E.H. Landseer, 1820/1848 . https://www.rawpixel.com/image/14020847/ruined-cottage-lakeside-etching-after-eh-landseer-18201848Free Image from public domain licenseConrad Matthaeus. Line engraving by S. à Lamsweerde, 1654 after himself. https://www.rawpixel.com/image/13973817/conrad-matthaeus-line-engraving-lamsweerde-1654-after-himselfFree Image from public domain licenseEdward Jenner. Line engraving by W. Skelton after W. Sharp, 1826, after W. A. Hobday, 1821. https://www.rawpixel.com/image/13995562/image-face-person-artFree Image from public domain licenseAfrican hut with adjoining kitchen and toilet facilities. Photograph, 1905/1915. https://www.rawpixel.com/image/13985710/photo-image-wood-public-domain-factoryFree Image from public domain licenseJohn Wesley. Line engraving by T. Holloway, 1791, after himself. https://www.rawpixel.com/image/14015506/john-wesley-line-engraving-holloway-1791-after-himselfFree Image from public domain licenseWilliam Cullen. Line engraving by J. Caldwall, 1799, after J. Tassie. https://www.rawpixel.com/image/14012239/william-cullen-line-engraving-caldwall-1799-after-tassieFree Image from public domain licenseAbraham Trembley. Stipple engraving by A. Tardieu after Clemens. https://www.rawpixel.com/image/13986390/abraham-trembley-stipple-engraving-tardieu-after-clemensFree Image from public domain licenseEx libris van Eugen Hubacs (1931) by anonymous and Kornél Révész https://www.rawpixel.com/image/13736215/libris-van-eugen-hubacs-1931-anonymous-and-kornel-reveszFree Image from public domain licenseMichael Friedrich Lochner von Hummelstein. Line engraving. https://www.rawpixel.com/image/13982506/michael-friedrich-lochner-von-hummelstein-line-engravingFree Image from public domain licenseJohn Sheldon. Mezzotint by W. Barnard, 1803, after J. Keenan. https://www.rawpixel.com/image/13992263/john-sheldon-mezzotint-barnard-1803-after-keenanFree Image from public domain licenseYves Delage in his laboratory at Roscoff, ca. 1911. Photogravure after Mathurin Méheut. https://www.rawpixel.com/image/13972238/image-person-art-manFree Image from public domain licenseWilliam Salmon. Line engraving by R. White, 1687, after himself. https://www.rawpixel.com/image/13971933/william-salmon-line-engraving-white-1687-after-himselfFree Image from public domain licenseHenry Wilson, from the series "Skeleton Leaves" by John P. Soule https://www.rawpixel.com/image/9028844/henry-wilson-from-the-series-skeleton-leaves-john-souleFree Image from public domain licenseCipriano Antonino Targioni. Line engraving by G. Vascellini after M. Targioni. https://www.rawpixel.com/image/14020583/cipriano-antonino-targioni-line-engraving-vascellini-after-targioniFree Image from public domain licenseJohann Adam Kulm. Line engraving by J. Houbraken, 1743, after J. Wessel, 1740. https://www.rawpixel.com/image/13999724/johann-adam-kulm-line-engraving-houbraken-1743-after-wessel-1740Free Image from public domain licensePetrus Camper. Line engraving by R. Vinkeles, 1778, after himself. https://www.rawpixel.com/image/14018202/petrus-camper-line-engraving-vinkeles-1778-after-himselfFree Image from public domain licenseBaron Albrecht von Haller. Line engraving by H. Pfenninger, 1775. https://www.rawpixel.com/image/13979759/baron-albrecht-von-haller-line-engraving-pfenninger-1775Free Image from public domain licenseArthur Aikin. Stipple engraving by J. Thompson after S. Drummond. https://www.rawpixel.com/image/13971431/arthur-aikin-stipple-engraving-thompson-after-drummondFree Image from public domain licenseNiccolò Gualteri. Line engraving by P. A. Pazzi after M. M. Gozzi. https://www.rawpixel.com/image/13983969/niccolo-gualteri-line-engraving-pazzi-after-gozziFree Image from public domain licenseWilliam Oughtred. Line engraving by [F. S.] after W. Hollar. https://www.rawpixel.com/image/13996929/william-oughtred-line-engraving-f-s-after-hollarFree Image from public domain licenseSir Isaac Newton. Line engraving by W. Sharp after Sir G. Kneller, 1702. https://www.rawpixel.com/image/13972891/sir-isaac-newton-line-engraving-sharp-after-sir-kneller-1702Free Image from public domain licenseOak tree (Quercus hindsii) with person lying at its base. Coloured lithograph, c.1857. https://www.rawpixel.com/image/13952038/image-plant-person-treeFree Image from public domain licenseThomas Cogan. Stipple engraving by J. Thomson after F.P.S. Gérard. https://www.rawpixel.com/image/13997472/thomas-cogan-stipple-engraving-thomson-after-fps-gerardFree Image from public domain licenseJohn Bulwer. Line engraving by T. Berry, 1820, after W. Faithorne. https://www.rawpixel.com/image/13980387/john-bulwer-line-engraving-berry-1820-after-faithorneFree Image from public domain licenseRenwick Williams, a man convicted of wounding women. Etching. https://www.rawpixel.com/image/14003242/renwick-williams-man-convicted-wounding-women-etchingFree Image from public domain licenseGaspard Monge, Comte de Peluse. Line engraving by Tavernier. https://www.rawpixel.com/image/13996129/gaspard-monge-comte-peluse-line-engraving-tavernierFree Image from public domain licenseThe Dripping Well, Hastings, Sussex. Line engraving, 1856. https://www.rawpixel.com/image/14002728/the-dripping-well-hastings-sussex-line-engraving-1856Free Image from public domain license