A 19th-Century lacquered brass French graphometer, unsigned, the semi-circle scale divided 0°-180° (X 2) with 2 fixed sights, the alidade with 2 vernier scales and twin sights, with universal ball and socket mounting, in pine case - 8¾ins. (22.2cm.) wide; and a lacquered brass artillery quadrant, the arc engraved 0°-35°, with bubble level, in case - 11ins. (28cm.) wide. (2)