Copy letter from William Musgrave, New College Oxford, to Francis Aston ' About the Polarity of Iron cast into an Ingot . Observations on the Worm. Mentioin of Mr Gerbertus etc. 'Would like enclosed papers retu rned to him, which are; Observations Astronomicall made in Aegypt by nthe hmost leqrned Mr John Greaves then Fellow of Merton College Oxon and afterwards Professor of Astronomy collected out of his papers In a Paper containing an Account of the Mountains of the Earth according to the Arabians. He has this Note. 15 December 1683