A Practical Treatise on the Science of Land and Engineering Surveying, Levelling, Estimating Quantities, &eE. & F. N. Spon, 1863 |
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... proof of accuracy where the chain only is used , a fourth line must be measured from either of the two sides , or from one of its angles to its opposite side ; this will also apply to the second case , or by measuring all the three ...
... proof of accuracy where the chain only is used , a fourth line must be measured from either of the two sides , or from one of its angles to its opposite side ; this will also apply to the second case , or by measuring all the three ...
Seite 78
... proof against error in every line . In very hilly districts the system of triangulating cannot always be carried out to the full extent , but but may in parts ; it then becomes necessary to use the theodolite to determine the position ...
... proof against error in every line . In very hilly districts the system of triangulating cannot always be carried out to the full extent , but but may in parts ; it then becomes necessary to use the theodolite to determine the position ...
Seite 88
... proof . These lines should always be taken on the most level or favourable ground . Commencing at ( 1 take offsets at every bend of the fence and opposite an abutting fence , as at 390 , and where it is intended to have a tie line , as ...
... proof . These lines should always be taken on the most level or favourable ground . Commencing at ( 1 take offsets at every bend of the fence and opposite an abutting fence , as at 390 , and where it is intended to have a tie line , as ...
Seite 89
... proof lines answer correctly to the book , proceed then to set off the lengths on the chain lines , and from those points at right angles set off the offsets ; through these points draw the fence lines . When inked in , calculate the ...
... proof lines answer correctly to the book , proceed then to set off the lengths on the chain lines , and from those points at right angles set off the offsets ; through these points draw the fence lines . When inked in , calculate the ...
Seite 90
... proof line . When short tie lines are introduced as a substitute for dia- gonals , or as proof lines in plotting the work , the angle lines may be further proved by multiplying the lengths of each line two , three , or four times ; the ...
... proof line . When short tie lines are introduced as a substitute for dia- gonals , or as proof lines in plotting the work , the angle lines may be further proved by multiplying the lengths of each line two , three , or four times ; the ...
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Häufige Begriffe und Wortgruppen
66 feet acres adjustment base line calculated centre chain lines chord circle circumference circumferentor co-sine column commence compass cross sections cube yards curve cuttings and embankments datum line decimals describe the arc diameter Diff difference distance Ditto divided division draw the line equal fence field-book fifth column figure fixed flag fore sights frustrum given ground half width height horizontal inches inclosure instrument intersecting land length line A B logarithm manner mark measure method minutes multiply needle number of degrees offsets opposite parallel parallelogram perpendicular Plate 28 plotted poles Problem proof line protractor quantity quotient radius reduced level right angled triangle roads Rule scale screw secant segment shown side A B sine slopes solid content spirit level square links station subtract surface survey surveyor TABLE take the angle tangent points telescope theodolite tie line trapezium vernier vulgar fractions whole
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Seite 108 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Seite 70 - To get, then, the quantity of shelled corn in a crib of corn in the ear, measure the length, breadth and height of the crib, inside of the rail; multiply the length by the breadth and the product by the height; then divide the product by two, and you have the number of bushels of shelled corn in the crib.
Seite 29 - Every circumference of a. circle, whether the circle be large or small, is supposed to be divided into 360 equal parts called degrees. Each degree is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds.
Seite 60 - PROBLEM V. To find the area of any regular polygon. RULE. Multiply the sum of its sides by a perpendicular drawn from its centre to one of its sides, and take half the product for the area. Or, multiply the square of the side of a polygon (from three to twelve, sides) 'by the numbers in the fourth column of the table for polygons, opposite the number of sides required, and the product will be the area nearly.
Seite 20 - Divide the given number into periods of two figures each, by setting a point over the place of units, another over the place of hundreds, and so on over every second figure, both to the left hand in integers, and to the right hand in decimals. Find the greatest square in the first period on the left hand, and set its root'on the right hand of the given number, after the manner of a quotient figure in Division.
Seite 72 - Cone or Pyramid. Rule: Multiply the circumference of the base by the slant height and half the product is the slant surface; if the surface of the entire figure is required, add the.
Seite 61 - As 7 is to 22, so is the diameter to the circumference; or, as 22 is to 7, so is the circumference to the diameter.
Seite 63 - ... is double that of another, contains four times the area of the other. 4. — The area of a circle is equal to the area of a triangle whose base is equal to the circumference, and perpendicular equal to the radius. 5. — The area of a circle is equal to the rectangle of its radius, and a right line equal to half its circumference. 6. — The area of a circle is to the square of the diameter as .7854 to 1 ; or, multiply half the circumference by half the diameter, and the product will be the area.
Seite 4 - ... and are those which are to be found, at present, in most of the common tables on this subject. The distinguishing mark of this system of logarithms is, that the index or logarithm of 10 is 1 ; that of 100 is 2 ; that of 1000 is 3 ; &c. And, in decimals, the logarithm of •! is — 1 ; that of -01 is — 2 ; that of '001 is — 3, &c.