Letter, from Henry Oldenburg to Robert Boyle, dated at London Discussing his work as secretary of the Society; states that revenue from the Transactions is reduced; thanks for queries about shining wood and that related experiments were well-received at the recent meeting of the Society; that a blood transfusion experiment was carried out on a man, but he became feverish a few days later; details about the dissection of an owl's eye from Caen (in French) 17 December 1667