A Treatise on Surveying,: Containing the Theory and Practice: : to which is Prefixed a Perspicuous System of Plane Trigonometry. : The Whole Clearly Demonstrated and Illustrated by a Large Number of Appropriate Examples. : Particularly Adapted to the Use of SchoolsKimber and Sharpless, no. 93, Market Street, and John Richardson, no. 244, Market Street., 1820 - 206 páginas |
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Página 194
... azimuth of the pole - star , when at its greatest elongation ; subtract its declination from 90 ° , and the remainder will be the polar distance . Then , As radius , Is to the secant of the latitude ; So is the sine of the polar ...
... azimuth of the pole - star , when at its greatest elongation ; subtract its declination from 90 ° , and the remainder will be the polar distance . Then , As radius , Is to the secant of the latitude ; So is the sine of the polar ...
Página 195
... Azimuth Azimuth Azimuth . Azimuth . Azimuth . I mo . 12 ° 4′54 ′′ 2 ° 8′13 ′′ 2 ° 11′54 ′′ 2 ° 15′58 ′′ 2 ° 20′28 ′′ 1814 7 mo . 12531 28 52 212 33 216 39 221 10 1815 1 mo . 12 4 29 27 48 7 mo 125 62826 211 28 215 31 220 0 2127 216 12 2 ...
... Azimuth Azimuth Azimuth . Azimuth . Azimuth . I mo . 12 ° 4′54 ′′ 2 ° 8′13 ′′ 2 ° 11′54 ′′ 2 ° 15′58 ′′ 2 ° 20′28 ′′ 1814 7 mo . 12531 28 52 212 33 216 39 221 10 1815 1 mo . 12 4 29 27 48 7 mo 125 62826 211 28 215 31 220 0 2127 216 12 2 ...
Página 196
... azimuths in the foregoing table correspond- ing to the 1st of the first month ( January ) of each year , are easterly , and those corresponding to the 1st of the seventh month ( July ) are westerly . In order to observe the greatest ...
... azimuths in the foregoing table correspond- ing to the 1st of the first month ( January ) of each year , are easterly , and those corresponding to the 1st of the seventh month ( July ) are westerly . In order to observe the greatest ...
Página 197
... azimuths take out , for the given time and latitude , the azimuth of the pole - star when at its greatest elongation . This azimuth will be west if the time is within two months , before or after the 1st of the first month ( January ) ...
... azimuths take out , for the given time and latitude , the azimuth of the pole - star when at its greatest elongation . This azimuth will be west if the time is within two months , before or after the 1st of the first month ( January ) ...
Página 198
... azimuth is east , but towards the east if the azimuth is west . Next remove the northerly stake , and set it up at the other extremity of the distance thus laid off ; then a straight line joining the two stakes will be a true meridian ...
... azimuth is east , but towards the east if the azimuth is west . Next remove the northerly stake , and set it up at the other extremity of the distance thus laid off ; then a straight line joining the two stakes will be a true meridian ...
Términos y frases comunes
ABCD ABFD acres adjacent adjacent angles angle ABC angle opposite angled triangle azimuth base bearing and distance breadth Calculation centre Co-secant Secant Co-sine Co-tang column decimal degrees DEMONSTRATION departure corresponding diff difference of latitude Dist divide division line draw equal EXAMPLES feet figures find the angle find the area four-pole chains fourth term given angle given area given bearing given ratio given side John Gummere Lat Dep latitude and departure length logarithm measured meridian distance natural number off-sets parallel parallelogram perches perpendicular perpendicular BC quired quotient radius rectangle remainder Required the area right angle right line right-angled triangle RULE semiperimeter side AB side AC sine square root station stationary line subtract tance Tang Tangent tract of land trapezium trapezoid triangle ABC trigonometry