The Anti-Slavery Society Convention, 1840, by Benjamin Robert Haydon (died 1846), given to the National Portrait Gallery… https://www.rawpixel.com/image/7666291/image-art-vintage-public-domainFree Image from public domain licenseJustus von Liebig (1803-1873), chemist. Oil painting by Carl Friedrich Wilhelm Adolph Trautschold, 1845. https://www.rawpixel.com/image/13954314/image-face-frame-personFree Image from public domain licenseJustus von Liebig (1803-1873), chemist. Oil painting by Carl Friedrich Wilhelm Adolph Trautschold, 1845. https://www.rawpixel.com/image/13961289/image-face-person-artFree Image from public domain licenseJustus von Liebig (1803-1873), chemist. Oil painting by Carl Friedrich Wilhelm Adolph Trautschold, 1845. https://www.rawpixel.com/image/13953996/image-face-frame-personFree Image from public domain licenseRembrandt van Rijn's large oblong plate. Original from the Minneapolis Institute of Art. https://www.rawpixel.com/image/7656079/image-vintage-art-public-domainFree Image from public domain licenseBaron Liebig's Malted Food Extract : for infants, children, invalids, and persons of weak digestion... / sole agents, Ansar… https://www.rawpixel.com/image/14014594/image-paper-face-personsFree Image from public domain licenseBritish inventors, politicians and military men, gathered in a room at Buckingham Palace. Engraving by C.G. Lewis, 1863… https://www.rawpixel.com/image/13986687/image-cat-person-artFree Image from public domain licenseBaron Liebig's Malted Food Extract : for infants, children, invalids, and persons of weak digestion... / sole agents, Ansar… https://www.rawpixel.com/image/13984155/image-paper-face-personsFree Image from public domain licenseJustus von Liebig. Stipple engraving by J. B. Hunt, 1845, after W. Trautschold, 1840. https://www.rawpixel.com/image/13996656/image-cartoon-face-personFree Image from public domain licenseBritish inventors, politicians and military men: a key to the identities of the sitters. Engraving by C.G. Lewis, 1863… https://www.rawpixel.com/image/13997233/image-dog-paper-cartoonFree Image from public domain licenseJustus von Liebig. Reproduction of line engraving after W. Trautschold, 1845. https://www.rawpixel.com/image/13972022/justus-von-liebig-reproduction-line-engraving-after-trautschold-1845Free Image from public domain licenseFriedrich Arnold. Lithograph by C. Bornemann, 1873, after P.L. Pierson. https://www.rawpixel.com/image/14018537/friedrich-arnold-lithograph-bornemann-1873-after-pl-piersonFree Image from public domain licenseJustus von Liebig. Line engraving by C. Barth after himself. https://www.rawpixel.com/image/13975009/justus-von-liebig-line-engraving-barth-after-himselfFree Image from public domain licenseJustus von Liebig and eight others seated in a committee. Gouache drawing. https://www.rawpixel.com/image/13993092/justus-von-liebig-and-eight-others-seated-committee-gouache-drawingFree Image from public domain licenseJustus von Liebig and colleagues at work in the analytical laboratory in Giessen. Lithograph after W. Trautschold, ca. 1840… https://www.rawpixel.com/image/13999915/image-cartoon-person-artFree Image from public domain licenseJustus von Liebig. Wood engraving after T.D. Scott, 1873. https://www.rawpixel.com/image/13976106/justus-von-liebig-wood-engraving-after-td-scott-1873Free Image from public domain license