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 & Richardson, 1814 - 346 páginas |
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Página 81
... east or west , or south so many degrees east or west , ac- cording as the line runs between the north and east or north and west , or between the south and east or south and west . The bearings of lines are generally taken with an in ...
... east or west , or south so many degrees east or west , ac- cording as the line runs between the north and east or north and west , or between the south and east or south and west . The bearings of lines are generally taken with an in ...
Página 82
... east and the other between the south and east , or when one is between the north and west and the other between the south and west , add them to- gether and subtract the sum from 180 ° ; the remainder will be the angle contained between ...
... east and the other between the south and east , or when one is between the north and west and the other between the south and west , add them to- gether and subtract the sum from 180 ° ; the remainder will be the angle contained between ...
Página 103
... east will be to the right hand and the west to the left . In NS take any convenient point as A for the place of be ... east , because the first bearing is east- erly ; then holding the protractor in this position , prick off 50 ° the ...
... east will be to the right hand and the west to the left . In NS take any convenient point as A for the place of be ... east , because the first bearing is east- erly ; then holding the protractor in this position , prick off 50 ° the ...
Página 105
... East 7.50 4. S. 11 ° 00 ′ E. 12.50 3 5 . 6 . South West 13.50 10 . 7. S. 36 ° 30 ′ W. 10 . 8. N. 38 ° 15 ' W. 8.50 Ans . 46A . 2R . 9P . EXAMPLE 3 . It is required to protract the survey and find the area from the following field ...
... East 7.50 4. S. 11 ° 00 ′ E. 12.50 3 5 . 6 . South West 13.50 10 . 7. S. 36 ° 30 ′ W. 10 . 8. N. 38 ° 15 ' W. 8.50 Ans . 46A . 2R . 9P . EXAMPLE 3 . It is required to protract the survey and find the area from the following field ...
Página 110
... east or west . Add up the northings and southings , and if the sums are not equal , find their difference , which will be the error of the survey in difference of latitude , which call by the same name as the least sum . Proceed in the ...
... east or west . Add up the northings and southings , and if the sums are not equal , find their difference , which will be the error of the survey in difference of latitude , which call by the same name as the least sum . Proceed in the ...
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A Treatise on Surveying: Containing the Theory and Practice: To Which Is ... John Gummere Sin vista previa disponible - 2016 |
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Página 97 - 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.
Página 43 - The angle at the centre of a circle is double of the angle at the circumference upon the same base, that is, upon the same part of the circumference.
Página 34 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
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Página 85 - A maypole, whose top was broken off by a blast of wind, struck the ground at 15 feet distance from the foot of the pole: what was the height of the whole maypole, supposing the broken piece to measure 39 feet in length ? Ans.
Página 25 - A plane rectilineal angle is the inclination of two straight lines to one another, which meet together, but are not in the same straight line.
Página 26 - Parallel straight lines are such as are in the same plane, and which being produced ever so far both ways, do not meet.
Página 91 - PROBLEM I. To find the area of a parallelogram; whether it be a square, a rectangle, a rhombus, or a rhomboides. RULE.* Multiply the length by the perpendicular height, and the product will be the area.
Página 96 - If one side and the angles are given ; then As the product of radius and the sine of the angle opposite the given side, To the product of the sines of the two other angles ; So is the square of the given side, To twice the area of the triangle. If PC (Fig.