[Ms. notes on the 1805 ruling engine (dividing engine) of Sir John Barton / Robert Barton. 1876-1890. 35p. on 19 leaves. Robert Barton inherited his grandfather's 'Dividing Machine' in 1878. He worked out the method of ruling and was awarded a first prize for his rulings at Melbourne Exhibition. The notes include a description and experiments made over fifteen years, including work (1880) for Melbourne Exhibition]