John Harrison

Print. Mezzotint of John Harrison, horologist (1693-1776). T. King pinxt. ; P.L. Tassaert fect. Engraved from the oil painting by Thomas King, 1767, also in Science Museum collection (Inv.1884-217). Publish'd as ye Act directs. Aug. 1st 1768. Portrait: sitter seated nearly TQL to left beside table with timekeeper H4, for ascertaining Longitude, by his right hand. Third timekeeper H3 delineated in background L. His invention compound pendulum in clock case background R. Tributary inscription to Harrison's work on longitude engraved in plate below image. Sheet trimmed to 41x31.5cm. Platemark 39.4x29cm.