Epistolae physiologicae super compluribus naturae arcanis; ubi variorum animalium atque plantarum fabrica, conformatio… https://www.rawpixel.com/image/13991016/image-cartoon-face-personFree Image from public domain licenseFree glass ball, Christmas ornament image, public domain holiday CC0 photo. https://www.rawpixel.com/image/5908979/image-background-xmas-public-domainFree Image from public domain licensePeter Dollond. Stipple engraving by J. Thomson, 1820, after J. Hoppner. https://www.rawpixel.com/image/14009628/peter-dollond-stipple-engraving-thomson-1820-after-hoppnerFree Image from public domain licenseChild with an eruption of an echthymatous nature on the right shoulder https://www.rawpixel.com/image/14015469/child-with-eruption-echthymatous-nature-the-right-shoulderFree Image from public domain licenseCharles Robert Darwin. Photograph by Julia Margaret Cameron, 1868. https://www.rawpixel.com/image/13961815/charles-robert-darwin-photograph-julia-margaret-cameron-1868Free Image from public domain licenseEtienne François Geoffroy. Line engraving by L. Surugue, 1737, after N. de Largillière. https://www.rawpixel.com/image/13980085/image-face-person-artFree Image from public domain licenseJohann Adam Hoege, physician of Brandenburg, in his library with medical books and a human skeleton behind him. Engraving. https://www.rawpixel.com/image/14013949/image-cartoon-face-personFree Image from public domain licenseBust of a lean male, looking down to his lower right. Etching by Wenceslaus Hollar after Leonardo da Vinci, 1648. https://www.rawpixel.com/image/13975417/image-cartoon-face-personFree Image from public domain licenseJohn Addington Symonds. Photograph by Ernest Edwards, 1867. https://www.rawpixel.com/image/13973658/john-addington-symonds-photograph-ernest-edwards-1867Free Image from public domain licenseSir John Fisher. Oil painting by John Prescott Knight, 1842. https://www.rawpixel.com/image/13996571/sir-john-fisher-oil-painting-john-prescott-knight-1842Free Image from public domain licenseHead and shoulders of an écorché cadaver, with smaller sketches of a nose and a bearded man. Red and black chalk drawing… https://www.rawpixel.com/image/13969044/image-cartoon-face-personFree Image from public domain licenseMaria (1606 - 1607) by Raffaello Schiaminossi and Raffaello Schiaminossi https://www.rawpixel.com/image/13777035/maria-1606-1607-raffaello-schiaminossi-and-raffaello-schiaminossiFree Image from public domain licensePouring red wine in glass image, free public domain drink CC0 photo. https://www.rawpixel.com/image/5922530/photo-image-background-christmas-public-domainFree Image from public domain licenseCupid learning to read the letters of the alphabet. Engraving after A. Allegri, il Corrreggio. https://www.rawpixel.com/image/13975594/image-face-person-bookFree Image from public domain licenseJohn Wallis. Line engraving by M. Burghers, 1699, after W. Sonmans, 1698. https://www.rawpixel.com/image/13981498/john-wallis-line-engraving-burghers-1699-after-sonmans-1698Free Image from public domain licenseBust length portrait of an unidentified woman by Hastings and White and Fisher https://www.rawpixel.com/image/14309844/bust-length-portrait-unidentified-woman-hastings-and-white-and-fisherFree Image from public domain licenseJacob Bell. Lithograph by R.J. Lane after Jessica Landseer, 1858. https://www.rawpixel.com/image/14012150/jacob-bell-lithograph-rj-lane-after-jessica-landseer-1858Free Image from public domain licenseBlaise Pascal. Engraving by G. Vertue, 1744, after G. Edelinck after F. Quesnel, junior. https://www.rawpixel.com/image/13988340/image-face-frame-personFree Image from public domain licenseSir Christopher Wren. Stipple engraving by W. Holl after Sir G. Kneller. https://www.rawpixel.com/image/13994135/sir-christopher-wren-stipple-engraving-holl-after-sir-knellerFree Image from public domain licenseJohn Gregory. Stipple engraving by W. Ridley, 1804, after F. Cotes, 1764. https://www.rawpixel.com/image/13982083/john-gregory-stipple-engraving-ridley-1804-after-cotes-1764Free Image from public domain licenseGeorges Louis Leclerc, Comte de Buffon. Line engraving by W. H. Lizars, 1843. https://www.rawpixel.com/image/13984469/georges-louis-leclerc-comte-buffon-line-engraving-lizars-1843Free Image from public domain licenseAlexander Russell. Line engraving by T. Trotter after Sir N. Dance-Holland. https://www.rawpixel.com/image/13973502/alexander-russell-line-engraving-trotter-after-sir-dance-hollandFree Image from public domain licenseJohn Brown [Bruno]. Line engraving by J. Adam after J. Cagnoni. https://www.rawpixel.com/image/13976812/john-brown-bruno-line-engraving-adam-after-cagnoniFree Image from public domain licenseUnidentified young man posed at table with books and cap, standing by C Hart https://www.rawpixel.com/image/14284696/unidentified-young-man-posed-table-with-books-and-cap-standing-hartFree Image from public domain licenseSay that again and I'll dip you in, Atlantic City, N.J. by Benjamin West Kilburn https://www.rawpixel.com/image/14295649/photo-image-face-person-oceanFree Image from public domain licenseJohn Storrar. Photograph by G.R. Fitt, the Album Portrait Co. https://www.rawpixel.com/image/13998593/john-storrar-photograph-gr-fitt-the-album-portrait-coFree Image from public domain licenseSir Isaac Newton. Stipple engraving by S. Freeman after Sir G. Kneller, 1702. https://www.rawpixel.com/image/13989727/sir-isaac-newton-stipple-engraving-freeman-after-sir-kneller-1702Free Image from public domain licenseJean Sylvain Bailly. Colour aquatint after J. B. Mauzaisse. https://www.rawpixel.com/image/14007078/jean-sylvain-bailly-colour-aquatint-after-mauzaisseFree Image from public domain licenseProfielportret van Louis Metayer Phzn (1770 - 1771) by Jean Baptiste Perroneau https://www.rawpixel.com/image/13792241/profielportret-van-louis-metayer-phzn-1770-1771-jean-baptiste-perroneauFree Image from public domain licenseA man's hand playing guitar. Original public domain image from Flickr https://www.rawpixel.com/image/4043289/original-public-domain-image-from-flickrFree Image from public domain licenseUnidentified man seated with female "spirit" by William H Mumler https://www.rawpixel.com/image/14311096/unidentified-man-seated-with-female-spirit-william-mumlerFree Image from public domain licenseLouis Joseph] E[rnest] Picard (1821 - 1877 by G M Legé and Bergeron https://www.rawpixel.com/image/14308963/louis-joseph-ernest-picard-1821-1877-lege-and-bergeronFree Image from public domain licenseMan with moustache and long sideburns wearing a hat sleeping under a tree in the woods, probably in New Hampshire by… https://www.rawpixel.com/image/14295521/photo-image-face-plant-personFree Image from public domain licenseViews in Woodward's Gardens. / [Self-portrait] by Eadweard J Muybridge https://www.rawpixel.com/image/14297006/views-woodwards-gardens-self-portrait-eadweard-muybridgeFree Image from public domain licenseJohn Brown [Bruno]. Line engraving by J. Caldwall after J. Donaldson. https://www.rawpixel.com/image/13975932/john-brown-bruno-line-engraving-caldwall-after-donaldsonFree Image from public domain licenseMusaeum historicum et physicum ... In primo illustrium literis virorum imagines ad vivum expressȩ continentur, additis… https://www.rawpixel.com/image/14000443/image-cartoon-face-personFree Image from public domain licenseJoseph Burns by James Earle McClees and Julian Vannerson https://www.rawpixel.com/image/14317693/joseph-burns-james-earle-mcclees-and-julian-vannersonFree Image from public domain licenseGeorge W. Jones by James Earle McClees and Julian Vannerson https://www.rawpixel.com/image/14316633/george-jones-james-earle-mcclees-and-julian-vannersonFree Image from public domain licenseAn alchemist holding tongs at his furnace. Etching by J. Wagner after D. Maggiotto. https://www.rawpixel.com/image/13998748/image-cartoon-face-personFree Image from public domain license