Elementary text book for young surveyors and levellersSimpkin, Marshall & Company, 1856 - 185 sider |
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Resultat 1-5 av 8
Side 35
... beginning . If the direction of the line is determined by an angle taken by the theodolite , or the bearing of the line be given by the circumferentor , the angle of the former or the bearing of the latter is placed in the central ...
... beginning . If the direction of the line is determined by an angle taken by the theodolite , or the bearing of the line be given by the circumferentor , the angle of the former or the bearing of the latter is placed in the central ...
Side 36
... beginning of the line ) with the point ( 34 on the line 485 ) . And , again , at Field No. 2 , page 47 , " from 685 on 731 to 574 on 635 , " the point started from , is that point upon the line 731 , which is 6 chains 85 links from the ...
... beginning of the line ) with the point ( 34 on the line 485 ) . And , again , at Field No. 2 , page 47 , " from 685 on 731 to 574 on 635 , " the point started from , is that point upon the line 731 , which is 6 chains 85 links from the ...
Side 41
... beginning of 12.73 chains , with the distance 6.80 chains , describe another arc ; their point of intersection B will be the vertex of the triangle ABC ; join B to S ; BS should measure 4.25 chains . Upon AC , AB , and BC , lay off the ...
... beginning of 12.73 chains , with the distance 6.80 chains , describe another arc ; their point of intersection B will be the vertex of the triangle ABC ; join B to S ; BS should measure 4.25 chains . Upon AC , AB , and BC , lay off the ...
Side 139
... beginning . The difference of longitude , or departure , is the distance that the end of the line is east or west from the beginning . In changing our position from one point on the earth's surface to another , in a direction making any ...
... beginning . The difference of longitude , or departure , is the distance that the end of the line is east or west from the beginning . In changing our position from one point on the earth's surface to another , in a direction making any ...
Side 147
... beginning , add all the northings together , and southings ; eastings together , and westings : the sum of the northings should equal that of the southings ; and the eastings , that of the westings . There is an allowable error of one ...
... beginning , add all the northings together , and southings ; eastings together , and westings : the sum of the northings should equal that of the southings ; and the eastings , that of the westings . There is an allowable error of one ...
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Elementary Text Book for Young Surveyors and Levellers with Copious Field ... Henry James Castle Ingen forhåndsvisning tilgjengelig - 2019 |
Elementary Text Book for Young Surveyors and Levellers With Copious Field ... Henry James Castle Ingen forhåndsvisning tilgjengelig - 2019 |
Vanlige uttrykk og setninger
2nd gate A. R. P. Answer angle of bearing angle of elevation base line bisect broad arrow centre chain surveying chains 50 links CHAP CHECK ANGLES check line circle circumferentor clamp corner correct cross customary determined diagonal DIAGRAM distance ditch divided draw equal Euclid EXAMPLE fence field book field notes flag gate post given angle given line given point half degrees hedge height horizontal inch interior angles intersection join Lancashire length line AC long scale mark meridian line motion needle number of degrees object observation offsets perpendicular placed plot pond protractor Required the true right angles right-angled triangle river road roods round screws similar triangles spirit level square chains square feet statute acres statute measure taken telescope theodolite top of bank trapezium triangle ABC true bearing true north vertical whole instrument width Wiltshire Wood
Populære avsnitt
Side 111 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Side 160 - LEVELLING is the art of representing the inequalities of the earth's surface, and of determining the relative heights of any number of points above or below a line, equidistant, at every point, from the centre of the earth.
Side 17 - The square of the hypothenuse is equal to the sum of the squares of the other two sides ; as, 5033 402+302.
Side 8 - To describe a square upon a given straight line. Let AB be the given straight line : it is required to describe a square upon AB.
Side 102 - The existence of parallax is determined by moving the eye about, when looking through the telescope, observing whether the cross wires change their position, and are flittering and undefined. To correct this error, first adjust the eye-piece, by means of the moveable eye-piece tube, till you can perceive the cross wire clearly defined, and sharply marked against any white object.
Side 23 - C will be found 9, the square root on D. For the square root of 144 : Set 1 on C to 10 on D ; then against 144 on C will be found the square root 12 on D. 42. To find the area of a board or plank : The rule is, to multiply the length by the breadth, the product will be the area ; therefore, by the sliding rule, Set 12 on B against the breadth in inches on A ; then...
Side 16 - E, the adjacent angles CEA, AED; these angles are together equal to two right angles. (i. 13.) Again, because the straight line DE makes with AB...
Side 28 - To find the area of a circle. Rule — Multiply the square of the diameter by .7854; or the square of the radius by 3.1416; or the square of the circumference by .07958. Find the area of a piston 20 in. in diam. Answer— 20!
Side 8 - To draw a straight line at right angles to a given straight line, from a given point in the same. Let AB be the given straight line, and C the given point in it : it is required to draw from the point C a straight line at right angles to AB.
Side 23 - To find the Area of a Triangle when the Three Sides are given. Rule. — From half the sum of the three sides subtract each side separately. Multiply the half sum and the three remainders together, and extract the square root of the product.