T.S. & J.D. Negus Brass Barometer
Late19th century barometer by American nautical instrument makers and chandlers, T. S. & J.D. Negus, New York as engraved on the 7.5 inch painted brass dial. This aneroid barometer is calibrated in inches of mercury from 27.8 to 31.2 in 2/100th increments and is boldly marked with the standard weather indications STORMY, RAIN, CHANGE, FAIR and VERY DRY. Adding to its desirability the lower half of the dial is equipped with a mercury thermometer reading fahrenheit/celsius.