A Treatise of Practical Surveying: Which is Demonstrated from Its First Principles ...Lewis Nichols, 1806 - 452 sider |
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Resultat 1-5 av 27
Side 161
... 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 ...
Side 162
... east , north and west , south and east , or south and west points in the bottom of the box , then put down NE , NW , SE , or SW , annexing thereto the number of degrees cut by the needle on the side of the ring , counting from the north ...
... east , north and west , south and east , or south and west points in the bottom of the box , then put down NE , NW , SE , or SW , annexing thereto the number of degrees cut by the needle on the side of the ring , counting from the north ...
Side 165
... east and west , or the situa- tion of the land , is obtained . Secondly , To take the bearing of each respective line from the meridian ; or to perform the office of the circumferentor , or quartered compass by the theodolite . Set your ...
... east and west , or the situa- tion of the land , is obtained . Secondly , To take the bearing of each respective line from the meridian ; or to perform the office of the circumferentor , or quartered compass by the theodolite . Set your ...
Side 176
... east , and W. at the bottom of your paper for west . Then let the following field - book be that which is to be protracted , the bearings being taken from the meridian , whether by a circumferentor , theo- dolite , 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 protracted , the bearings being taken from the meridian , whether by a circumferentor , theo- dolite , or semicircle , and ...
Side 177
... 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 degrees be less than 180 , turn the arc of your protractor upwards , or to- wards the west ...
... 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 degrees be less than 180 , turn the arc of your protractor upwards , or to- wards the west ...
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Vanlige uttrykk og setninger
40 perches ABCD acres altitude Answer base bearing blank line centre chains and links chord circle circumferentor Co-sec Co-sine Co-tang Tang column contained cyphers decimal decimal fraction diameter difference distance line divided divisor draw drawn east edge EXAMPLE feet field-book figures fore four-pole chains half the sum height hypothenuse inches instrument Lat Dep Lat latitude line of numbers logarithm measure meridian distance multiplied needle number of degrees off-sets parallel parallelogram perpendicular piece of ground plane Plate prob PROBLEM proportion protractor quotient radius right angles right line scale of equal SCHOLIUM Secant second station sect semicircle side sights sine square root stationary distance sun's suppose survey taken tance tangent thence theo theodolite THEOREM trapezium triangle ABC trigonometry true amplitude two-pole chains vane variation whence
Populære avsnitt
Side 25 - 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.
Side 207 - ... that triangles on the same base and between the same parallels are equal...
Side 40 - 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.
Side 43 - Triangles upon equal bases, and between the same parallels, are equal to one another.
Side 103 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Side 31 - Figures which consist of more than four sides are called polygons ; if the sides are all equal to each other, they are called regular polygons. They sometimes are named from the number of. their sides, as a five-sided figure is called a pentagon, one of six sides a hexagon, &"c.
Side 31 - ... they are called regular polygons. They sometimes are named from the number of their sides, as a five-sided figure is called a pentagon, one of. six sides a hexagon, &c. but if their sides are not equal to each other, then they are called irregular polygons, as an irregular pentagon, hexagon, &c.
Side 45 - The hypothenuse of a right-angled triangle may be found by having the other two sides ; thus, the square root of the sum of the squares of the base and perpendicular, will be the hypothenuse. Cor. 2. Having the hypothenuse and one side given to find the other; the square root of the difference of the squares of the hypothenuse and given side will be the required side.
Side 265 - As the length of the whole line, Is to 57.3 Degrees,* So is the said distance, To the difference of Variation required. EXAMPLE. Suppose it be required to run a line which some years ago bore N. 45°.
Side 32 - Things that are equal to one and the same thing are equal to one another." " If equals be added to equals, the wholes are equal." " If equals be taken from equals, the remainders are equal.