Transit theodolite, 6-inch, with magnetic compass, by Troughton & Simms, Fleet Street, London, England, 1826-1850 Transit theodolite, British, 1826-1850 1826-1850
Sympiesometer with 9-inch ivory scale, in case, by L. Casella, 1858. Air barometer or "sympiesometer", 1858. 1858
Minimum thermometer with bifurcated bulb, on ebonite, by Louis Casella, c. 1873. Minimum thermometer with bifurcated bulb 1873