Paper, 'An account of an experiment made November the 25th 1705 at a meeting of th Royal Society at Gresham College showing that light is produceable upon a swift attrition of amber on woolen in vacuo' by Francis Hauksbee Also account of an experiment to show the necessity of the air's presence, at least some degree of it, in the production of fire upon the attrition of flint and steel - experiment carried out on 5 December 1705 at Gresham College Also account of experiment to show that light is produced upon attrition of amber in vacuo - carried out on 12 December 1705 Relating to machine described in CLP/18i/92 Read to the Royal Society on 12 December 1705 Published in Philosophical Transactions as part of 'Several experiments on the attrition of bodies in vacuo. Made before the Royal Society at Gresham College' [1705]