Letter, from Henry Oldenburg to Robert Boyle, dated at London Thanks for imparting knowledge about the growth of the magnet; concerns printing a list of Boyle's work; discussing the experiment to show respiration in a dog; concerns distribution of the history of the Society; concerning political events in Europe (in French); that Frenchmen have brought back a nearly pure metal from America, some of which is going to be turned into an assay 15 October 1667