A System of Geometry and Trigonometry: Together with a Treatise on Surveying: Teaching Various Ways of Taking the Survey of a Field; Also to Protract the Same and Fine the Area. Likewise, Rectangular Surveying; Or, an Accurate Method of Calculating the Area of Any Field Arithmetically, Without the Necessity of Plotting It. To the Whole are Added Several Mathematical Tables ... with a Particular Explanation ... and the Manner of Using Them ... |
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Page 5
... give directions for every case that may occur . In all practical Sciences much must be left to the judg- ment of the practitioner , who , if he is well acquainted with the general principles of his Art , will readily learn to apply ...
... give directions for every case that may occur . In all practical Sciences much must be left to the judg- ment of the practitioner , who , if he is well acquainted with the general principles of his Art , will readily learn to apply ...
Page 32
... gives the greater Angle ACB Subtract , gives the lesser Angle ABC 2.62325 1.77815 10.47969 12 25784 2.62325 9.63459 71 ° 40 ' 23 20 95 00 48 20 The ... give the greatest to half the Sum of the Segments , that is to half the 32 TRIGONOMETRY .
... gives the greater Angle ACB Subtract , gives the lesser Angle ABC 2.62325 1.77815 10.47969 12 25784 2.62325 9.63459 71 ° 40 ' 23 20 95 00 48 20 The ... give the greatest to half the Sum of the Segments , that is to half the 32 TRIGONOMETRY .
Page 33
... give the greatest Seg- ment ; and this half Difference subtracted from the half Sum will be the lesser Segment . The ... gives the greater Segment AD 75.0 Subtract , gives the lesser Segment BD 30.0 Thus the Triangle is divided into two ...
... give the greatest Seg- ment ; and this half Difference subtracted from the half Sum will be the lesser Segment . The ... gives the greater Segment AD 75.0 Subtract , gives the lesser Segment BD 30.0 Thus the Triangle is divided into two ...
Page 34
... gives the Angle ACB 98 ° 45 ′ This Case may also be solved according to the fol- lowing PROPOSITION . In every plane Triangle , As the Product of any two Sides containing a required Angle ; is to the Product of half the Sum of the three ...
... gives the Angle ACB 98 ° 45 ′ This Case may also be solved according to the fol- lowing PROPOSITION . In every plane Triangle , As the Product of any two Sides containing a required Angle ; is to the Product of half the Sum of the three ...
Page 36
... give Hundredths of a Rod : Thus , 17 Two Rod Chains and 21 Links make 34 Rods and 84 Hundreths ; expressed thus 34.84 Rods . If the Links exceed 25 add 1 to the number of Rods and multiply the excess by 4 : Thus , 15 Two Rod . Chains ...
... give Hundredths of a Rod : Thus , 17 Two Rod Chains and 21 Links make 34 Rods and 84 Hundreths ; expressed thus 34.84 Rods . If the Links exceed 25 add 1 to the number of Rods and multiply the excess by 4 : Thus , 15 Two Rod . Chains ...
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A System of Geometry and Trigonometry: Together with a Treatise on Surveying ... Able Flint No preview available - 2017 |
A System of Geometry and Trigonometry: Together with a Treatise on Surveying ... Able Flint No preview available - 2017 |
Popular passages
Page 26 - As the base or sum of the segments Is to the sum of the other two sides, So is the difference of those sides To the difference of the segments of the base.
Page 23 - The square of the hypothenuse is equal to the sum of the squares of the other two sides ; as, 5033 402+302.
Page 8 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
Page 25 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Page 25 - The solution of this CASE depends on the following PROPOSITION. In every Plane Triangle, As the Sum of any two Sides ; Is to their Difference ; So is the Tangent of half the Sum of the two opposite Angles ; To the Tangent of half the Difference between them. Add this half difference to half the Sum of the Angles and you will have the greater Angle ; and...
Page 8 - The radius of a circle is a line drawn from the centre to the circumference, as A, B.
Page 40 - Field work and protraction are truly taken and performed ; if not, an error must have been committed in one of them : In such cases make a second protraction ; if this agrees with the former, it is to be presumed the fault is in the Field work ; a re-survey must then be taken.
Page 40 - Let his attention first be directed to the map, and inform him that the top is north, the bottom south, the right hand east, and the left hand west.