Drawing. Black ink, parts for reducing sculpture copying machine bult by James Watt, 1806-1808. Drawing, parts for reducing sculpture copying machine 1806-1808
Drawing. Sketches and instructions for mounting a diamond on the end of a wire. dated Heathfield Oct 30th. On reverse, 30 Oct 08 / JWatt[?] Senr[?] / Drawing of a Diamd for Nathan. 10" x 8" no watermark. Sketches and instructions for mounting a diamond on the end of a wire 1808
Harpenden pocket stadiometer sent out to Ludlow Boys' School as part of a series of nationwide measurements 1972-3