Elementary text book for young surveyors and levellersSimpkin, Marshall & Company, 1856 - 185 sider |
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Side xii
... 120 Example 2 . 122 Second application . by two stations Example . Two other Examples . - No . 1 . Answers to each . 124 . 126 . 127 No. 2 . . 128 . 128 USEFUL AND PRACTICAL PROBLEMS . To measure a Base Line xii CONTENTS .
... 120 Example 2 . 122 Second application . by two stations Example . Two other Examples . - No . 1 . Answers to each . 124 . 126 . 127 No. 2 . . 128 . 128 USEFUL AND PRACTICAL PROBLEMS . To measure a Base Line xii CONTENTS .
Side 35
... station measured to , is put at the top , on the right ; the points of commencement and termination of the line can ... Stations are generally expressed in the field book by the following character △ , which , in the plan , THE FIELD ...
... station measured to , is put at the top , on the right ; the points of commencement and termination of the line can ... Stations are generally expressed in the field book by the following character △ , which , in the plan , THE FIELD ...
Side 36
... station point , which should be always that of a needle . In Chain Surveying , the BASE LINE , perhaps , had better ... stations are but few , and mostly come within the exceptions above referred to , being generally base lines to ...
... station point , which should be always that of a needle . In Chain Surveying , the BASE LINE , perhaps , had better ... stations are but few , and mostly come within the exceptions above referred to , being generally base lines to ...
Side 39
... station , whence to measure afterwards , a check to the point B ; note it △ ( a station ) in the left hand column , as the check - line will be to the left . Having completed the measurement of the line , put where to in the right ...
... station , whence to measure afterwards , a check to the point B ; note it △ ( a station ) in the left hand column , as the check - line will be to the left . Having completed the measurement of the line , put where to in the right ...
Side 40
... station was at the end of the previous line , and the line was measured up to the edge of the ditch , which is denoted by the ditch crossing , —thus ; ditch— ( 12 · 73 ) — × next mark BA the direction you are going A - B in - whether to ...
... station was at the end of the previous line , and the line was measured up to the edge of the ditch , which is denoted by the ditch crossing , —thus ; ditch— ( 12 · 73 ) — × next mark BA the direction you are going A - B in - whether to ...
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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.