1851 Great Exhibition: Official Catalogue: Class IX.: Charles Hart
72. HART, CHARLES, Wantage.
A registered universal portable grinding-mill. The first part consists of two plates, with steel cutters, the bottom one running horizontally; the grain, in passing through which, is split into small pieces; it is then conveyed between two stones, one stationary, and the other running vertically, where it is reduced to fine meal.