Experimental Chaise, mid-18th century (etching on paper)

Artist: Francis Hayman (c1708-1776) View of experimental chaise being pulled by two pairs of horses with jockeys, plan of chaise beneath image, `A Springs to wind up the traces. B Tin Boxes to supply the Wheels with Oyl. C Jacks to wind up the Ropes that kept the Pole steady. D. a spring under the Pole to wind up the Traces of the leading Horses. E a Button which by it's distance from the End of the Pole discover'd to the Wheel Riders which Horses drew most. F Whalebone springs.' Johann Sebastian Müller (1715-1792) (Emigrated to London in 1744 and remained in England the rest of his career. The Golden Head, the corner of James Street Long Acre, London (1748)) sculp. Francis Hayman (c1708-1776)delin. J. Wright Invt.