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 ...O. D. Cooke, 1813 - 168 páginas |
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Página 15
... places , as at F and G ; upon F and G describe two Arches to intersect each other be- low the Line as at D ; lay a Rule from C to D and draw a Line from C to the given Line . Perpendiculars may be more readily raised and let fall , by a ...
... places , as at F and G ; upon F and G describe two Arches to intersect each other be- low the Line as at D ; lay a Rule from C to D and draw a Line from C to the given Line . Perpendiculars may be more readily raised and let fall , by a ...
Página 24
... places of Decimals than you wish to work with , if the one at the Right Hand of the last which you wish to retain is more than 5 , add a Unit to the last ; because a greater number than 5 is more than half . As the Table of Artificial ...
... places of Decimals than you wish to work with , if the one at the Right Hand of the last which you wish to retain is more than 5 , add a Unit to the last ; because a greater number than 5 is more than half . As the Table of Artificial ...
Página 45
... place . Other methods of taking the Survey of a Field , by the Chain only are mentioned in some Treatises on this subject , but they are rather curious than useful ; and it is much better to ascertain the Angles by an accurate Compass ...
... place . Other methods of taking the Survey of a Field , by the Chain only are mentioned in some Treatises on this subject , but they are rather curious than useful ; and it is much better to ascertain the Angles by an accurate Compass ...
Página 53
... place with- in the Field , from which the several Angles may be seen . Take the Bearing of the Angles , and measure their Distance from the Station . FIELD BOOK . See PLATE III . Fig . 61 . Ch . L. From Station to A. N. 20 ° W. 8,70 ...
... place with- in the Field , from which the several Angles may be seen . Take the Bearing of the Angles , and measure their Distance from the Station . FIELD BOOK . See PLATE III . Fig . 61 . Ch . L. From Station to A. N. 20 ° W. 8,70 ...
Página 59
... place , in the Plot of a Field - From any two Stations , while surveying the Field , take the Bear- ing of the object ; and the intersection of the Lines , which represent the Bearings , will determine the place of the object ; in the ...
... place , in the Plot of a Field - From any two Stations , while surveying the Field , take the Bear- ing of the object ; and the intersection of the Lines , which represent the Bearings , will determine the place of the object ; in the ...
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A System of Geometry and Trigonometry: Together with a Treatise on Surveying ... Able Flint Sin vista previa disponible - 2017 |
A System of Geometry and Trigonometry: Together with a Treatise on Surveying ... Able Flint Sin vista previa disponible - 2017 |
Pasajes populares
Página 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.
Página 23 - The square of the hypothenuse is equal to the sum of the squares of the other two sides ; as, 5033 402+302.
Página 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.
Página 25 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Página 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...
Página 8 - The radius of a circle is a line drawn from the centre to the circumference, as A, B.
Página 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.
Página 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.