Letter, from Henry Oldenburg to Robert Boyle, dated at London Concerning the printing of 'Philosophical Transactions'; concerns Auzout's animadversions to Hevelius' 'Prodromus'; concerning M de Son's watch with a slender spring instead of a pendulum; concerning difference of opinion between Duke of Albemarle and the Dutch Ambassador about going to sea; concerning the discovery of a northwest passage by two Englishmen and one Frenchman; postscript has a sequel to John Beale's barometrical notes 30 December 1665