Letter, from Martin Lister to Henry Oldenburg, dated at York Signed autograph Concern about whether a box has arrived at the Royal Society; stating that 'Multipedas' gives acidic juice; concerning an experiment for obtaining sap from sycamore (the 'bleeding of sycamore') which was carried out on other trees; concerning the sap from a mulberry tree Transcription in 'The correspondence of Henry Oldenburg', ed and trans by A Rupert Hall & Marie Boas Hall, vol 7, p 443 Partially printed in 'Philosophical Transactions', vol 5, no 68, p 2069 and vol 6, no 70, p 2120 8 February 1670