Letter, from Henry Oldenburg to Robert Boyle, dated at London Concerns establishment of trade routes and Anglo-Dutch commercial rivalry, particularly about a Dutch trade passage to China; details of a thunderstom in Italy; that the steeple of St Paul's would be a good place to carry out experiments about falling bodies, the Toricellian experiment etc; concerning a paper read by Packer about damp in mines; Zulichem's suggested experiment to show sound vibrations in 'hard bodies'; Wylde's promised experiments to soften steel without fire and to fix colours; Howard's experiments about fixing log wood; concerns meeting at Povey's house 25 August 1664