The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtE. Duyckinck, 1811 - 508 σελίδες |
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Σελίδα 11
... observed . RULE II . To reduce Quantities of the same , or of different denominations to Decimal Fractions of higher de- nominations . If the given quantity consist of one denomina- tion only , write it as the numerator of a vulgar ...
... observed . RULE II . To reduce Quantities of the same , or of different denominations to Decimal Fractions of higher de- nominations . If the given quantity consist of one denomina- tion only , write it as the numerator of a vulgar ...
Σελίδα 29
... observed , that the operation is shorter in the larger prime numbers ; for when any given number exceeds 400 , the first quotient , being added to the Logarithm of its next lesser number , will give the Logarithm sought , true to 8 , or ...
... observed , that the operation is shorter in the larger prime numbers ; for when any given number exceeds 400 , the first quotient , being added to the Logarithm of its next lesser number , will give the Logarithm sought , true to 8 , or ...
Σελίδα 46
... follows the more easy . A corollary is a consequent truth , deduced from a foregoing demonstration . A scholium , is a remark or observation made up- on something going before . - GEOMETRICAL THEOREMS . THEOREM I. PL . 1 , 46 GEOMETRY .
... follows the more easy . A corollary is a consequent truth , deduced from a foregoing demonstration . A scholium , is a remark or observation made up- on something going before . - GEOMETRICAL THEOREMS . THEOREM I. PL . 1 , 46 GEOMETRY .
Σελίδα 103
... to be required . From these proportions it may be observed ; that to find a side , when the angles and one side are given , any side may be made the radius ; and to find an angle , one of the given sides TRIGONOMERTY . 103.
... to be required . From these proportions it may be observed ; that to find a side , when the angles and one side are given , any side may be made the radius ; and to find an angle , one of the given sides TRIGONOMERTY . 103.
Σελίδα 135
... observe , that all slant , or inclined surfaces , as sides of hills , are measured horizontally , and not on the plane or surface of the hill , and is thus affected . PL , 8. fig . 4 . Let ABC be a hill , the hindmost chainman is to ...
... observe , that all slant , or inclined surfaces , as sides of hills , are measured horizontally , and not on the plane or surface of the hill , and is thus affected . PL , 8. fig . 4 . Let ABC be a hill , the hindmost chainman is to ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
acres altitude Answer arch azimuth base bearing blank line centre chains and links chord circle circumferentor Co-sec Co-tang column compasses contained decimal difference distance line divided divisions draw east Ecliptic edge feet field-book figures fore four-pole chains geom given number half the sum Horizon glass hypothenuse inches instrument Lat Dep Lat latitude length logarithm measure meridian distance multiplied natural co-sine natural sine needle Nonius number of degrees object observed off-sets opposite parallel parallelogram pegs perches perpendicular plane pole pole star Portmarnock PROB protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect Sextant side sights square station stationary distance subtract Sun's survey taken Tang tangent theo theodolite trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence
Δημοφιλή αποσπάσματα
Σελίδα 38 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Σελίδα 25 - 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.
Σελίδα 197 - RULE. From half the sum of the three sides subtract each side severally.
Σελίδα 106 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
Σελίδα 27 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc. Thus BA is the versed sine of the arc AG.