Clocks: faces (top), and mechanisms (below) of a Ferguson (right), and a Smeaton-Franklin clock (left). Coloured engraving… https://www.rawpixel.com/image/13953744/image-cartoon-faces-circleFree Image from public domain licenseClocks: a Smeaton-Franklin clock (top), and a Ferguson clock (below). Engraving by J. Taylor. https://www.rawpixel.com/image/14008564/image-paper-pattern-circleFree Image from public domain licenseRoyal Naval Hospital, Greenwich: visitors in the Painted Hall, with Horatio Nelson's catafalque. Coloured aquatint by J.… https://www.rawpixel.com/image/13980933/image-person-art-hospitalsFree Image from public domain licensePearlwort (Sagina species): flowering plant and floral segments. Coloured engraving after J. Sowerby, 1810. https://www.rawpixel.com/image/14006228/image-paper-flower-plantFree Image from public domain licenseSections of a furnace used in the processing of brass. Engraving by Mutlow after J. Farey. https://www.rawpixel.com/image/13972918/image-paper-cartoon-patternFree Image from public domain licenseMetallurgy: a furnace used in the processing of metals. Engraving by Mutlow after J. Farey. https://www.rawpixel.com/image/14000782/image-paper-cartoon-patternFree Image from public domain license