Copy letter from Herbert Rix, to Mgs de Camarasa, Chateau de Carresse, Carresse, Bassee Pyrenees, France 'Sir, I am instructed by the Secretaries of the Royal Society to acknowledge the receipt of your letter of February 19th. inclosing a copy of a letter sent to the Academy of Sciences in Paris. Thanking you for the consideration thus shown to the Society. I am, Sir, Your Obedient Servant, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 23 February 1894