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 Find 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 : Compiled from Various AuthorsOliver D. Cooke, 1804 - 168 páginas |
Dentro del libro
Resultados 6-10 de 22
Página 61
... whether the Courses are right . This will show him whether a re - survey is necessary , and will enable him to ascertain whether the error lies in the In EXAMPLE I. the upper numbers are the North- ings Courses or Distances . SURVEYING .
... whether the Courses are right . This will show him whether a re - survey is necessary , and will enable him to ascertain whether the error lies in the In EXAMPLE I. the upper numbers are the North- ings Courses or Distances . SURVEYING .
Página 62
... North- ings , & c . as found by a Table of Difference of Latitude and Departure . The several Columns being added , the Northings are found to exceed the Southings 47 Links ; and the Westings to exceed the Eastings 24 Links . They may ...
... North- ings , & c . as found by a Table of Difference of Latitude and Departure . The several Columns being added , the Northings are found to exceed the Southings 47 Links ; and the Westings to exceed the Eastings 24 Links . They may ...
Página 63
... North Areas , and of those multiplied by the Southings in the Column of South Areas ; add up these two Columns and subtract the less from the greater ; the Remainder will be dou- ble the Area of the Field , in Square Rods or Square ...
... North Areas , and of those multiplied by the Southings in the Column of South Areas ; add up these two Columns and subtract the less from the greater ; the Remainder will be dou- ble the Area of the Field , in Square Rods or Square ...
Página 64
... North Areas . The Line 3 C represents the Sum of the Eastings made by the first and second Courses , which is 45.12 , the second number in the first Depart- ure Column ; if to this you add 20.74 the length of the Line 2 B you have 65.86 ...
... North Areas . The Line 3 C represents the Sum of the Eastings made by the first and second Courses , which is 45.12 , the second number in the first Depart- ure Column ; if to this you add 20.74 the length of the Line 2 B you have 65.86 ...
Página 65
... North Areas . Note . It will be observed that against the third and sixth Cour- ses there are no Areas ; the reason is that these Courses being one East and the other West , there is no Northing or Southing to be multiplied into them ...
... North Areas . Note . It will be observed that against the third and sixth Cour- ses there are no Areas ; the reason is that these Courses being one East and the other West , there is no Northing or Southing to be multiplied into them ...
Otras ediciones - Ver todas
System of Geometry and Trigonometry: Together with a Treatise on Surveying ... Abel Flint Sin vista previa disponible - 2017 |
System of Geometry and Trigonometry: Together With a Treatise on Surveying ... Abel Flint Sin vista previa disponible - 2017 |
Pasajes populares
Página 28 - 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 27 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Página 6 - The Circumference of every circle is supposed to be divided into 360 equal parts, called Degrees ; and each degree into 60 Minutes, each minute into 60 Seconds, and so on.
Página 24 - In this case the" hypothenuse may be found by the square root without finding the angles ; according to the following PROPOSITION. IN EVERY RIGHT ANGLED TRIANGLE, THE SUM OF THE SQUARES OF THE TWO LEGS IS EQUAL TO THE SQUARE OF THE HYPOTHENUSE. In the above EXAMPLE, the square of AB 78.7 is 6193.69, the square of BC 89 is 7921 ; these added make 14114,69 the square root of which is nearest 119.
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 33 - To find the area of a trapezoid. RULE. Multiply half the sum of the two parallel sides by the perpendicular distance between them : the product will be the area.
Página 6 - Therefore all radii of the same circle are equal. 13. The diameter of a circle is a right line drawn from one side of the circumference to the other, passing through the centre ; and it divides the circle into two equal parts, called semicircles ; as AB or DE.
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.
Página 23 - The square of the hypothenuse is equal to the sum of the squares of the other two sides ; as, 5033 402+302.