Improvements proposed on the sail of a windmill Improvements proposed on the sails of a windmill so as to answer the inequalities of the power of the wind. MS. memorandum and plan of shuttered sail, 1:24. Ink. [1772] Inscr: (F) This plan was sent to Mr Smeaton 17 March 1772 for his opinion. It was a scheme of Mr. Andrew Miekles. It is very similar to Wm. Cubitt's Patent 9 May 1807 [No. 3041] Copied from Mr Smeaton's Letters received, 12, page 35. Excl. J.F. l.s. [Original plan of shuttered sail] 1:24. Ink wash. [1772] 1772