The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art. With a New Set of Accurate Mathematical TablesA. S. Barnes, 1839 - 412 páginas |
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Página 124
... east into 90 , from the north to the west into 90 , from the south to the east into 90 , and from the south to the west into 90 degrees ; so the degrees are num- bered from the north to the east or west , and from the south to the east ...
... east into 90 , from the north to the west into 90 , from the south to the east into 90 , and from the south to the west into 90 degrees ; so the degrees are num- bered from the north to the east or west , and from the south to the east ...
Página 126
... east and west , or the situation of the land , is ob- tained . To take the bearing of each respective line from the meridian ; or to perform the office of the circumferentor , or quartered compass , by the the- odolite . Set your ...
... east and west , or the situation of the land , is ob- tained . To take the bearing of each respective line from the meridian ; or to perform the office of the circumferentor , or quartered compass , by the the- odolite . Set your ...
Página 132
... east , and W at the bottom of your paper for west . Then let the following field - book be that which is to be pro- tracted , the bearings being taken from the meridian , whether by a circumferentor , theodolite , or semicircle , and ...
... east , and W at the bottom of your paper for west . Then let the following field - book be that which is to be pro- tracted , the bearings being taken from the meridian , whether by a circumferentor , theodolite , or semicircle , and ...
Página 133
... east . Or , if the right - hand be made the north and the left the south , the west will be then up and the east down . In this case , if the degree be less than 180 , turn the arc of your protractor upwards , or towards the west ; and ...
... east . Or , if the right - hand be made the north and the left the south , the west will be then up and the east down . In this case , if the degree be less than 180 , turn the arc of your protractor upwards , or towards the west ; and ...
Página 150
... east by south ; and after sailing north - east 12 miles , it was found to bear south - east by east . It is required to determine the place of that headland , and the ship's distance from it at the last observation . Ans . 26.0728 miles ...
... east by south ; and after sailing north - east 12 miles , it was found to bear south - east by east . It is required to determine the place of that headland , and the ship's distance from it at the last observation . Ans . 26.0728 miles ...
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Términos y frases comunes
ABCD acres altitude arch base bearing blank line centre chains and links circle circumferentor column compasses contained Cosine Sine cube root decimal diagonal diameter difference of latitude divided divisions divisor draw east ecliptic edge EXAMPLE feet field-book figure four-pole chains geometrical series given angle given number half the sum height Hence horizon glass hypothenuse inches instrument length logarithm manner measure meridian distance multiplied needle nonius number of degrees object observed opposite parallelogram perches perpendicular plane prob PROBLEM proportion protractor quadrant quotient radius rhombus right angles right line scale of equal screw secant sect sector semicircle side Sine Cotang square root station stationary distance subtract suppose survey taken Tang tangent theo theodolite THEOREM trapezium triangle ABC trigonometry two-pole chains vane vulgar fraction whence
Pasajes populares
Página 49 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Página 41 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
Página 41 - The radius of a circle is a right line drawn from the centre to the circumference.
Página 45 - A lemma is something which is premised, or demonstrated, in order to render what follows more easy. A corollary is a consequent truth derived immediately from some preceding truth or demonstration.
Página 35 - DIVISION BY LOGARITHMS. RULE. From the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.
Página 21 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.