In the early part of his reign, George III sought to furnish Buckingham House (now Palace) with the finest horological and scientific instruments of the day.  This barometrical clock – which records air pressure against time – was among them, and is exceptional for its mechanical complexity.  It is nevertheless also distinguished by the richness of its oak case, which incorporates bronze ornaments in the shape of lion masks and military trophies.  The barograph was made by the Scot Alexander Cumming (c.1732-1814), and cost George III the large sum of £1,178.  Cumming was also paid an annual fee for maintaining the clock.