A fine anodised brass aneroid barometer in fitted rosewood case, Marianna Frederica Dent, London, circa 1865

3¾-inch silvered dial signed M F Dent, 33 & 34 Cockspur St, London, inscribed with weather indications and calibrated from 25 to 31 inches, fine vernier with adjustment by milled knob, the drum case mounted in a square brass-bound rosewood case and retained by matching milled brass bolts, together with a matching adjustment screwdriver