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 |
Dentro del libro
Página 38
... twice . PROBLEM III . To measure a given angle A. Fig . 34 . Describe the arc mn with the chord of 60 degrees , as in the last problem . Take the arc mn between the di- viders , and that extent applied to the scale of chords , will show ...
... twice . PROBLEM III . To measure a given angle A. Fig . 34 . Describe the arc mn with the chord of 60 degrees , as in the last problem . Take the arc mn between the di- viders , and that extent applied to the scale of chords , will show ...
Página 67
... twice the logarithm of the perpendicular , sub- tract the logarithm of the base , and add the corresponding natural number to the base ; then , half the sum of the logarithms of this sum , and of the base , will be the loga- rithm of ...
... twice the logarithm of the perpendicular , sub- tract the logarithm of the base , and add the corresponding natural number to the base ; then , half the sum of the logarithms of this sum , and of the base , will be the loga- rithm of ...
Página 90
... × AB ; therefore ( 11.5 . ) rad .: sin . A :: AC X AB : CD × AB ; but CD × AB is equal to twice the area 2. What is the area of a triangle two sides of the triangle : hence the truth of the rule is evident . 90 MEASURING LAND .
... × AB ; therefore ( 11.5 . ) rad .: sin . A :: AC X AB : CD × AB ; but CD × AB is equal to twice the area 2. What is the area of a triangle two sides of the triangle : hence the truth of the rule is evident . 90 MEASURING LAND .
Página 93
... twice AD , twice BD , and twice CF are the sum of the sides of the triangle , or twice AH , it is obvious that AD , BD and CF together , are equal to AH ; consequently CF is equal to BH or BM ; hence CM or CL is equal to BF or BD ; and ...
... twice AD , twice BD , and twice CF are the sum of the sides of the triangle , or twice AH , it is obvious that AD , BD and CF together , are equal to AH ; consequently CF is equal to BH or BM ; hence CM or CL is equal to BF or BD ; and ...
Página 103
... twice the distance between the pins , having the ends tied together be put about the pins ; and if the point of a pin or pencil , applied to the thread , and held so as to keep it uniformly tense , be moved round , till it return to the ...
... twice the distance between the pins , having the ends tied together be put about the pins ; and if the point of a pin or pencil , applied to the thread , and held so as to keep it uniformly tense , be moved round , till it return to the ...
Términos y frases comunes
ABCD ABFD acres adjacent adjacent angles angle ABC angle opposite angled triangle base bearing and distance breadth Calculation centre Co-secant Secant Co-sine Co-tang column cube root decimal 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 number given ratio given side John Gummere Lat Dep latitude and departure length logarithm M.
M. Sine measured meridian distance natural number off-sets parallel parallelogram perches perpendicular quired quotient radius rectangle remainder Required the area right angle right line right-angled triangle RULE semiperimeter side AB side AC square root station stationary line subtract survey tance Tang tangent tract of land trapezium trapezoid triangle ABC trigonometry