19th century, signed "Piffaretti / 4 Penton Place / Pentonville", mahogany veneered, featuring a damp/dry hygrometer, engraved metal archway mercury thermometer, central mirror mount within an ebonized reeded frame, and large round main dial above a spirit level, signed, cistern door opens to glass and mercury tubing.

37 x 10 in.

From the Collection of Professor Roberto Severino, Washington, D.C.

Good estate condition, breaks to internal tubing, clouding to glass, light surface wear to case, missing one knob. Please note that due to the presence of mercury, this item cannot be shipped.