Letter, from Henry Oldenburg to Robert Boyle, dated at London Concerning a proposed building for the Society; instructions about what Fellows should do if they want to deposit items with the Society; concerning an enquiry about Greeks' faith and the doctrine of the sacrament; concerns examining air pressure at sea; concerning Dr Lower's explanation for why some horses' eyes are blind; concerning minerals sent by Colepresse; concerns raising money for next summer's fleet; that the Frenchman who had a blood transfusion is well again; concerning political events in Europe 28 January 1667