RT Journal Article T1 Review: Perfect Mechanics A1 Jim Bennett YR 2014 VO 1 IS Spring 2014 AB NO ‘le Sieur Ramsden’ is the form quoted by Sorrenson; in fact Hornsby, in his letters to the Duke of Marlborough, consistently uses ‘the Sieur Ramsden’. Royal Astronomical Society MSS, Radcliffe A.2, passim. NO 2 Royal Astronomical Society MSS, Radcliff A.2.48. NO Royal Astronomical Society MSS, Radcliff A.2.135. NO Royal Astronomical Society MSS, Radcliff A.2.138. PB The Science Museum Group SN 2054-5770 LA eng DO 10.15180/140109 UL http://journal.sciencemuseum.org.uk/browse/2014/review-perfect-mechanics/ CR Willach R, 1996, ‘New light on the invention of the achromatic telescope objective’, Notes and Records of the Royal Society of London, 50, pp 195–210 WT Science Museum Group Journal OL 30