Elements of Surveying, and Navigation: With Descriptions of the Instruments and the Necessary Tables |
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Page vi
... Notes ,. 124 To Determine the Angle between two Courses , .. 126 Of Dividing Land , .. 127 SECTION IV . Method of Surveying the Public Lands , .. 131 Variation of the Needle , ... Method of Ascertaining the Variations ,. To Find the ...
... Notes ,. 124 To Determine the Angle between two Courses , .. 126 Of Dividing Land , .. 127 SECTION IV . Method of Surveying the Public Lands , .. 131 Variation of the Needle , ... Method of Ascertaining the Variations ,. To Find the ...
Page vii
... Notes , - 166 Plotting the Work , .... 167 BOOK IV . GEODESIC , TRIGONOMETRIC , AND MARITIME SURVEYING . SECTION I. Geodesic and Trigonometric Surveying , ... 172 Preliminary Reconnoissance and Establishment of Signals , .. 174 ...
... Notes , - 166 Plotting the Work , .... 167 BOOK IV . GEODESIC , TRIGONOMETRIC , AND MARITIME SURVEYING . SECTION I. Geodesic and Trigonometric Surveying , ... 172 Preliminary Reconnoissance and Establishment of Signals , .. 174 ...
Page 35
... note the number of units , and parts of a unit to which it is equal . Then multiply this number by the number of parts which the unit of the scale represents , and the product will be the length of the line . For example , suppose the ...
... note the number of units , and parts of a unit to which it is equal . Then multiply this number by the number of parts which the unit of the scale represents , and the product will be the length of the line . For example , suppose the ...
Page 67
... note should be made , that ten chains have been measured ; after which , the measurement continued as before , until the whole distance is marking pins are to be returned to the leader , and the SEC . 1 ] 67 MEASUREMENT OF DISTANCES ...
... note should be made , that ten chains have been measured ; after which , the measurement continued as before , until the whole distance is marking pins are to be returned to the leader , and the SEC . 1 ] 67 MEASUREMENT OF DISTANCES ...
Page 68
... note the distance ab . -В Then remove the staves and place them at b and d : make the chain horizontal , and note the distance cd . Measure in the same manner the line ƒC ; the sum of the horizontal lines ab , cd , fC , is equal to AB ...
... note the distance ab . -В Then remove the staves and place them at b and d : make the chain horizontal , and note the distance cd . Measure in the same manner the line ƒC ; the sum of the horizontal lines ab , cd , fC , is equal to AB ...
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Common terms and phrases
axis back-sight base line bearing called centre column comp Cosine Cosine D course decimal degrees determined diff difference of latitude difference of level direction divided double meridian distance draw east error example feet figure fore-sight given angle given line given point half hence horizontal distance horizontal line hypothenuse inch instrument intersection LatDegDegDegDeg length limb line of collimation logarithm longitude M.
M. Sine marked measure method middle latitude miles multiplied paper parallel PARALLEL SAILING perpendicular plane of reference plane sailing plane triangle protractor quotient radius right angles right-angled triangle rods sailing scale of chords scale of equal screws secant sector sides sights Sine Cotang Sine D spherical excess spider's lines square chains staff station straight line subtract surface survey Tang tangent telescope theodolite trigonometrical vernier plate vertical yards
Popular passages
Page 14 - The logarithm of the quotient of two numbers is equal to the logarithm of the dividend minus the logarithm of the divisor.
Page 42 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees...
Page 13 - The logarithm of a number is the exponent of the power to which it is necessary to raise a fixed number, in order to produce the first number.
Page 25 - ... 20. An EQUILATERAL polygon is one which has all its sides equal; an equiangular polygon, is one which has all its angles equal. 21. Two polygons are mutually equilateral, when they have their sides equal each to each, and placed in the same order : that is to say, when following their bounding lines in the same direction, the first side of the one is equal to the first side of the other, the second to the second, the third to the third, and so on. 22. Two polygons are mutually equiangular, when...
Page 20 - The difference of the logarithms, as here used, means the algebraic difference ; so that, if the logarithm of the divisor have a negative characteristic, its sign must be changed to positive, after diminishing it by the unit, if any, carried in the subtraction from the decimal part of the logarithm.
Page 135 - Soon after the organization of the present government, several of the states ceded to the United States large tracts of wild land, and these together with the lands since acquired by treaty and purchase, constitute what is called the public lands or public domain. Previous to the year 1802 these lands were parcelled out without reference to any general plan, in consequence of which the titles often conflicted with each other, and in many cases, several grants .covered the same premises. In the year...
Page 96 - Then, find the areas of the triangles separately, and their sum will be the area of the quadrilateral.
Page 43 - The tangent of an arc is the line which touches it at one extremity, and is limited by a line drawn through the other extremity and the centre of the circle. Thus, AC is the tangent of the arc AB.
Page 28 - B + 0, the product would be indicated thus; (A+D)x(A-B+C), whatever is enclosed within the curved lines, being considered as a single quantity. The same thing may also be indicated by a bar : thus, A+B+OXD, denotes that the sum of A, B and C, is to be multiplied by D.
Page 1 - The minutes in the left.hand column of each page, increasing downwards, belong to the degrees at the top ; and those increasing upwards, in the right.hand column, belong to the degrees below.