| 11. | The first Ramsden theodolite was built for this survey.
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| 12. | Some types of transit theodolites do not allow the measurement of vertical angles.
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| 13. | Johnathon Sission was the first to incorporate a telescope on a theodolite in 1725.
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| 14. | With continuing refinements instruments steadily evolved into the modern theodolite used by surveyors today.
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| 15. | This theodolite was required by the countdown computer in order for launch to proceed.
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| 16. | Prior to the invention of the theodolite, the goniometer was used in surveying.
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| 17. | The angles were measured with theodolites by Gambey.
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| 18. | He invented a marine theodolite which was a key element of his improved Method.
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| 19. | Theodolites and levels are often used by constructors rather than surveyors in first world countries.
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| 20. | A modern theodolite consists of a movable telescope mounted within two perpendicular seconds of arc.
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