A Heath & Wing Waywiser, English, third quarter of the 18th century. Signed to dial Heath & Wing, Strand, London, with silvered dial divided for furlongs and miles, brass centre, six-spoke wheel with steel rim tread, mahogany fork body with shaped top and bar handles,on later stand, Thomas Heath & Tycho Wing had premises in the Strand from 1751 until 1773.
The "Waywiser," a surveyor's measuring device. Surveyors today use a Waywiser (also known as an Odometer or a Perambulator) to measure linear distances on the ground and the dial measures in yards (the longer of the two hands), poles (an antiquated term interchangeable with rods, 16.5 feet, 320 poles per mile), furlongs (220 yards), and miles. The iron-rimmed wheel is 31.5 inches in diameter, covering 99 inches with each revolution, or one pole in each two turns, and can be removed for transporting the instrument. The engraved, silvered dial and steel hands are connected to a clock-like movement, which in turn is driven by an iron shaft running up the inside of one of the wheel supports.
Heath, Thomas (scientific instrument maker; British; Male; 1714; c.1742 - 1757; Wing joins Heath in partnership). Also known as Heath, Thomas; Heath & Wing; Wing, Tycho at the Hercules & Globe, in the Strand, London (from c.1721) opposite Exeter Exchange, in the Strand, London (from c.1742).