Unpublished letter, 'On the method proposed by Professor [George Biddell] Airy for expanding the disturbing function in his paper in "Philosophical Transactions" for 1833' from James Ivory to the Royal Society Ivory compares Airy's method of expanding the disturbing function with that of Lagrange, suggesting that Airy has 'borrowed' from Lagrange. Subject: Mathematics Received 14 November 1833 Written by Ivory at 20 Southampton Street, Pentonville [London]. 14 November 1833