100-Foot tape measure, British, 1928
1928
Mercury Thermometer for Underground Temperatures, 1861-1881
1861-1881
Reichert's Thermoregulator (Temperature Controller), 1871-1900
1871-1900
Fenner type rangefinder, British, 1892
1892
Clarke's-type electromagnetic machine
1854-1860
Original model of Edison's patent electric pen, 1875-1876
1875-1876
Electrostatic toy showing a hunter shooting birds
Tree height measurer, British, 1945-1948
1945-1948
"Baby Cine" Posograph Exposure Calculator
1928
Mining compass & clinometer, German, 1901-1907
1901-1907
Rain-gauge, by George James Symons, 1860-1899
1860-1899
Early Platinum Electrical Resistance Thermometer, 1871-1890
1871-1890
Model of a Plankton Net, 1969
1969
Map case, British, 1921-1940
1921-1940
Model of the midships section of HMS Challenger
1872-1876 (expedition); 1976-1977 (model)
Model of the bows section of HMS Challenger
1872-1876 (expedition); 1977 (model)
Bean Bag used for Natural Childbirth, 1994
1994
Mountain barometer, 1845-1855
1845-1855
Levelling staff, British, 1971-1980
1971-1980
Mining transit theodolite, 4.5-inch, Troughton & Simms, with fitted box and tripod
1901-1915
Model (mahogany case not present)
1795-1805
Model (mahogany case not present)
1795-1805