Inventions: various items including a fountain-pen, a pendulum, and a pantograph. Engraving by T. Jeffrys. https://www.rawpixel.com/image/14018126/image-paper-public-domain-gunFree Image from public domain licenseClocks: composite pendulum, side and front view with details. Engraving by Mutlow. https://www.rawpixel.com/image/13971141/image-paper-pattern-public-domainFree Image from public domain licensePendulum Curve illustration in high resolution by Frederick H. Evans (1853-1943). Original from Getty Museum. Digitally… https://www.rawpixel.com/image/4031939/illustration-image-art-abstract-blueFree Image from public domain licenseHand drawn longcase clock retro style https://www.rawpixel.com/image/410824/free-illustration-image-ancient-antique-artworkView licenseHand drawn longcase clock retro style https://www.rawpixel.com/image/410706/free-illustration-image-clock-ancient-antiqueView licensePenn's clock from The Historic Mansions And Buildings Of Philadelphia, With Some Notice Of Their Owners And Occupants by… https://www.rawpixel.com/image/572980/grandfather-clock-vintage-styleFree Image from public domain licenseClocks: two composite pendulums, and diagrams of their motions. Coloured engraving by J. Pass, 1809. https://www.rawpixel.com/image/13960478/image-paper-art-musicFree Image from public domain licensePenn's clock from The Historic Mansions And Buildings Of Philadelphia, With Some Notice Of Their Owners And Occupants by… https://www.rawpixel.com/image/573019/grandfather-clock-vintage-styleFree Image from public domain licenseClocks: an escapement mechanism (top), and a pendulum (below). Engraving by E. Kennion after C. Varley. https://www.rawpixel.com/image/13959243/image-paper-public-domain-drawingFree Image from public domain licenseThe Pit and the Pendulum, second Plate by Alphonse Legros https://www.rawpixel.com/image/8971109/the-pit-and-the-pendulum-second-plate-alphonse-legrosFree Image from public domain licenseClocks: various types of clock mechanism. Engraving by J. W. Lowry. https://www.rawpixel.com/image/13967459/clocks-various-types-clock-mechanism-engraving-lowryFree Image from public domain licenseHand drawn longcase clock retro style https://www.rawpixel.com/image/410813/free-illustration-image-clock-grandfather-ancientView licenseInventions: various items including fountains, a Greek-key fret, and a fourchee. Engraving by T. Jeffrys. https://www.rawpixel.com/image/13953014/image-pattern-water-public-domainFree Image from public domain licenseHand drawn clock isolated on white background https://www.rawpixel.com/image/410658/premium-illustration-vector-ancient-antique-black-and-whiteView licenseGrandfather clock illustration vector https://www.rawpixel.com/image/572951/grandfather-clock-vintage-styleView licenseHand drawn longcase clock retro style https://www.rawpixel.com/image/410681/free-illustration-image-ancient-antique-artworkView licenseClocks: composite pendulum, side and front view with details. Engraving by Mutlow. https://www.rawpixel.com/image/13970980/image-public-domain-drawing-clocksFree Image from public domain licenseGrandfather clock illustration vector https://www.rawpixel.com/image/572968/grandfather-clock-vintage-styleView licenseHand drawn longcase clock retro style https://www.rawpixel.com/image/411208/free-illustration-image-etching-ancient-antiqueView licenseClocks: diagrams of the motions of composite pendulums. Engraving by Mutlow. https://www.rawpixel.com/image/13981007/clocks-diagrams-the-motions-composite-pendulums-engraving-mutlowFree Image from public domain licenseInventions: various items including a fountain-pen, a pendulum, and a pantograph. Engraving by T. Jeffrys. https://www.rawpixel.com/image/13999197/image-paper-technology-public-domainFree Image from public domain licenseInventions: various items including a fountain-pen, a pendulum, and a pantograph. Engraving by T. Jeffrys. https://www.rawpixel.com/image/14003237/image-paper-cartoon-personFree Image from public domain licenseMeasurement: a scholar making observations of a pendulum, with two servants, one writing at a table. Engraving by J. Basire… https://www.rawpixel.com/image/13998824/image-cartoon-person-booksFree Image from public domain license