The word of the day is theodolite:
- Surveying. a precision instrument having a telescopic sight for establishing horizontal and sometimes vertical angles. Compare transit (def 6).
(http://dictionary.reference.com/browse/theodolite)
"Stevedores hauled the Jeannette's weapons on deck... Next came the navigational and scientific equipment: chronometers, hydrometers, ozonometers, magnetometers, aneroid barometers, transits, sextants, pendulums, zenith telescopes, microscopes, test tubes, Bunsen burners, theodolites."
- Hampton Sides, In the Kingdom of Ice: The Grand and Terrible Polar Voyage of the USS Jeannette
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