Details
An ivory Improved Pocket Barometer
of sympiesometer pattern, with mercury column, vernier, dial and thermometer graduated in Fahrenheit and Réaumur, in shaped, leather-covered case -- 9½in.(24.5cm.)high
of sympiesometer pattern, with mercury column, vernier, dial and thermometer graduated in Fahrenheit and Réaumur, in shaped, leather-covered case -- 9½in.(24.5cm.)high