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ELEVATIONS |
Altitudes |
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ALTIMETRY |
The art of measuring altitudes, or heights. |
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ALTAZIMUTH |
An instrument for taking azimuths and altitudes
simultaneously. |
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ALTIMETER |
An instrument for taking altitudes, as a quadrant,
sextant, etc. |
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DIOPTRA |
An optical instrument, invented by Hipparchus, for taking
altitudes, leveling, etc. |
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THERMOBAROMETER |
An instrument for determining altitudes by the
boiling point of water. |
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CROSS-STAFF |
An instrument formerly used at sea for taking the
altitudes of celestial bodies. |
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LABEL |
A brass rule with sights, formerly used, in connection with
a circumferentor, to take altitudes. |
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QUADRAT |
An old instrument used for taking altitudes; -- called
also geometrical square, and line of shadows. |
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FORESTAFF |
An instrument formerly used at sea for taking the
altitudes of heavenly bodies, now superseded by the sextant; -- called
also cross-staff. |
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QUADRANT |
An instrument for measuring altitudes, variously
constructed and mounted for different specific uses in astronomy,
surveying, gunnery, etc., co... |