Letter, from William Molyneux to Edmond Halley, dated at Dublin Concerning the role of the secretary of the Society and that this person should be paid; concerning work to produce a natural history; thanks for his election to the Fellowship and for sending correspondence; concerning a child with extraordinary mathematical ability; concerning Hooke and his baroscope; concerning the controversy about Hevelius and his telescopic sights; discussing a proposition about 'shooting ascents and descents' (with figure) Read to the Royal Society on 21 April 1686 8 April 1686