Elements of Surveying: With a Description of the Instruments and the Necessary Tables, Including a Table of Natural SinesA.S. Barnes and Company, 1840 |
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Page 17
... length , breadth , height , or thickness . 2 A line is lengh without breadth , or thickness . The extremities of a line are called points : a point , there- fore , has neither length , breadth , nor thickness , but position only . 3. A ...
... length , breadth , height , or thickness . 2 A line is lengh without breadth , or thickness . The extremities of a line are called points : a point , there- fore , has neither length , breadth , nor thickness , but position only . 3. A ...
Page 18
... length and breadth , without height or thickness . 6. A plane is a surface , in which , if two points be assumed at pleasure , and connected by a straight line , that line will lie wholly in the surface . 7. Every surface , which is not ...
... length and breadth , without height or thickness . 6. A plane is a surface , in which , if two points be assumed at pleasure , and connected by a straight line , that line will lie wholly in the surface . 7. Every surface , which is not ...
Page 22
... length , two inches wide , and a fifth of an inch in thick- ness . It should be made of a hard material , perfectly straight and smooth . The hypothenuse of the right - angled triangle , which is length , and it is most convenient to ...
... length , two inches wide , and a fifth of an inch in thick- ness . It should be made of a hard material , perfectly straight and smooth . The hypothenuse of the right - angled triangle , which is length , and it is most convenient to ...
Page 23
... length , and it is most convenient to have one of the sides considerably longer than the other . We can solve , with ... length into equal portions . If , for example , the line ab of a given length , say one inch , be divided into any ...
... length , and it is most convenient to have one of the sides considerably longer than the other . We can solve , with ... length into equal portions . If , for example , the line ab of a given length , say one inch , be divided into any ...
Page 24
... length . On ab describe the square abcd . ab and dc each into ten equal parts . Draw af and the other nine parallels as in the figure . Produce ba to the left , and lay off the unit of the scale any convenient number of times , and mark ...
... length . On ab describe the square abcd . ab and dc each into ten equal parts . Draw af and the other nine parallels as in the figure . Produce ba to the left , and lay off the unit of the scale any convenient number of times , and mark ...
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Common terms and phrases
adjustment angle of elevation axis azimuth back-sights base line bearing bubble called centre clamp-screw coincide column comp Cosine Sine Cotang course curve decimal determined difference of level direction divided double meridian distance draw east error example extremity feet field notes figure find the area given line given point ground Gunter's chain Hence horizontal angle horizontal distance horizontal plane hypothenuse inches instrument intersection LatDegDegDegDeg Distance latitude and departure length levelling screws line AC line of collimation logarithm M.
M. Sine measure method multiplied object parallel passing perpendicular piece of land plane of reference PROBLEM protractor radius right angles right-angled triangle side sights similar triangles spider's lines square chains square rods subtract surface survey Tang tangent theodolite thumb-screw truly horizontal Turn the vernier upper telescope vernier plate vertical angle vertical limb yards
Popular passages
Page 20 - FRACTION is a negative number, and is one more than the number of ciphers between the decimal point and the first significant Jigure.
Page 57 - ... the square of the hypothenuse is equal to the sum of the squares of the other two sides.
Page 42 - 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.
Page 7 - ... 46 46 46 46 46 46 46 46 46 46 46 46 46 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 43 N.
Page 36 - This is a scale of two feet in length, on the faces of which a variety of scales are marked. The face on which the divisions of inches are made, contains, however, all the scales necessary for laying down lines and angles. These are, the scale of equal parts, the diagonal scale of equal parts, and the scale of chords, all of which have been described.
Page 138 - Take a board, of about one foot square, paste white paper upon it, and perforate it through the center; the diameter of the hole being somewhat larger than the diameter of the telescope of the theodolite. Let this board be so fixed to a vertical staff" as to slide up and down freely ; and let a small piece of board, about three inches square, be nailed to the lower edge of it, for the purpose of holding a candle.
Page 42 - Mathematics which treats of the solution of plane triangles. In every plane triangle there are six parts : three sides and three angles. When three of these parts are given, one being a side, the remaining parts may be found by computation.
Page 29 - AXIOM is a self-evident truth ; such as, — 1. Things which are equal to the same thing, are equal to each other. 2. If equals be added to equals, the sums will be equal. 3. If equals be taken from equals, the remainders will be equal. 4. If equals be added to unequals, the sums will be unequal.
Page 18 - Find from the table the logarithm of the first four figures, and to it prefix a characteristic less by unity than all the places of figures in the given number. Take from the last column on the right of the page, marked D, the number on the same horizontal line with the logarithm, and multiply this number by the figures that have been considered as ciphers : then cut off from the right hand as many places for decimals as there are figures in the multiplier, and add the product so obtained to the...
Page 91 - ... 10, and the remainder will be the logarithm of double the area of the triangle. Find, from the table, the number answering to this logarithm, and divide it by 2 ; the quotient will be the required area (Geom.