The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtEvert Duyckinck, 1814 - 508 σελίδες |
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Σελίδα 40
... quadrant or the fourth part of the peri- phery therefore the radius DC is always the sine of a quadrant , or of the fourth part of the circle BD . Sines are said to be of as many degrees as the arc contains parts of 360 : so the radius ...
... quadrant or the fourth part of the peri- phery therefore the radius DC is always the sine of a quadrant , or of the fourth part of the circle BD . Sines are said to be of as many degrees as the arc contains parts of 360 : so the radius ...
Σελίδα 41
... quadrant is called the complement thereof : Thus DH is the com- plement of the arc HB . fig . 8 . 25. And what an arc wants of a semicircle is called the supplement thereof : thus AH is the supplement of the are HB . fig . 8 . 26. The ...
... quadrant is called the complement thereof : Thus DH is the com- plement of the arc HB . fig . 8 . 25. And what an arc wants of a semicircle is called the supplement thereof : thus AH is the supplement of the are HB . fig . 8 . 26. The ...
Σελίδα 62
... quadrant of a circle described by the radius CB ; HB an arc of it , and DH its complement ; HL or FC the sine , FH or CL its co - sine , BK its tangent , DI its co - tan- gent ; CK its secant , and CI its co - secant . Fig . 8 . 1. The ...
... quadrant of a circle described by the radius CB ; HB an arc of it , and DH its complement ; HL or FC the sine , FH or CL its co - sine , BK its tangent , DI its co - tan- gent ; CK its secant , and CI its co - secant . Fig . 8 . 1. The ...
Σελίδα 74
... quadrant BD , and continu- ed to BE , we shall there have the tangents of 10 , 20 , 30 , 40 , & c . and the secants C 10 , C 20 , C 30 , & c . are transferred to the line CF , by describing the arcs 10 , 10 : 20 , 20 : 30 , 30 , & c ...
... quadrant BD , and continu- ed to BE , we shall there have the tangents of 10 , 20 , 30 , 40 , & c . and the secants C 10 , C 20 , C 30 , & c . are transferred to the line CF , by describing the arcs 10 , 10 : 20 , 20 : 30 , 30 , & c ...
Σελίδα 92
... quadrant divided into eight parts or points of the compass , in order to facilitate the work of the navigator in laying down a ship's course . Of the line of longitudes . The line of longitudes is a line divided into sixty unequal parts ...
... quadrant divided into eight parts or points of the compass , in order to facilitate the work of the navigator in laying down a ship's course . Of the line of longitudes . The line of longitudes is a line divided into sixty unequal parts ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
acres altitude Answer arch base bearing blank line centre chains and links circle circle of latitude circumferentor Co-sec Co-tang column compasses contained decimal Dep Lat Dep difference Dist divided divisions draw east Ecliptic edge EXAMPLE feet field-book figures fore four-pole chains geometrical series given number half the sum Horizon glass hypothenuse inches instrument Lat Dep Lat latitude length logarithm measure meridian distance multiplied Natural Co-sines natural sine Nonius number of degrees object observed off-sets opposite parallelogram perches perpendicular plane pole pole star PROB proportion protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect semicircle Sextant side sights square root station stationary distance subtracted survey taken Tang tangent theo theodolite trapezium triangle ABC trigonometry vane versed sine vulgar fraction