Letter, from Henry Oldenburg to Marcello Malpighi, dated at London That Malpighi's parcel of books had been presented to the Society; concerning the accuracy of Cassini's ephemerides of Jupiter; concerning the work of Castelli; looking forward to Malpighi's work on the history of the silkworm; informs about the work of the Fellows of the Society; that John Wilkins's book on 'Real character and Philosophical Language' was being translated into Latin; concerning Robert Boyle's work on physico-mechanical experiments upon the weight and elasticity of the air Read to the Royal Society on 10 December 1668 22 December 1668