| 11. | Sometime around 1810 he decided to fabricate surveying instruments, selling chains, compasses, and small transit telescopes.
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| 12. | The audit is a surveying instrument, a questionnaire, for school districts to use to collect data.
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| 13. | Beside a section on mine-surveying instruments it also included a section on the history of mining surveying.
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| 14. | His development preceded the sextant and was motivated by the need to create a superior surveying instrument.
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| 15. | The American was using a special surveying instrument, and was released after a few hours, Mikhailov said.
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| 16. | There were workshops, where false bottoms were made in provisions chests to hold sextants and other surveying instruments.
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| 17. | Kidder describes a carpenter's surveying instrument as " a tool for imposing levelness on an irregular world ."
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| 18. | His surveying instrument, inscribed Henry Voigt Philadelphia , was transferred to the Smithsonian National Museum of American History in 1891.
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| 19. | Voigt produced the surveying instrument used by U . S . Surveyor General, Isaac Briggs, to survey the Louisiana Purchase.
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| 20. | As Savilian Professor he lectured courses in arithmetic, algebra, plane and spherical geometry, the use of logarithms and surveying instruments.
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