The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtJ.J. Harper, 1828 - 435 σελίδες |
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Σελίδα 39
... quadrant or the fourth part of the periphery ; 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 periphery ; 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 40
... quadrant is called the complement thereof : Thus DH is the complement of the arc HB . fig . 8 . 25. And what an arc wants of a semicircle is called the supple- ⚫ ment thereof : thus AH is the supplement of the arc HB . fig . 8 . 26 ...
... quadrant is called the complement thereof : Thus DH is the complement of the arc HB . fig . 8 . 25. And what an arc wants of a semicircle is called the supple- ⚫ ment thereof : thus AH is the supplement of the arc HB . fig . 8 . 26 ...
Σελίδα 45
... Quadrant , is founded on this Corollary , annexed as an obvious consequence of the theorem . A ray of light SA , ( Pl . 14. Fig . 2. ) from the sun , against the mir- ror at A , is reflected at an angle equal to its incidence ; and now ...
... Quadrant , is founded on this Corollary , annexed as an obvious consequence of the theorem . A ray of light SA , ( Pl . 14. Fig . 2. ) from the sun , against the mir- ror at A , is reflected at an angle equal to its incidence ; and now ...
Σελίδα 54
... 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 - tangent ; CK its secant , and CI its co - secant . Fig . 8 . 1. The co ...
... 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 - tangent ; CK its secant , and CI its co - secant . Fig . 8 . 1. The co ...
Σελίδα 62
... quadrants , AD , DB , be each divided into 9 equal parts , every one of which will be 10 degrees ; if then from the centre C , lines be drawn through 10 , 20 , 30 , 40 , & c . the divisions of the quadrant BD , and continued to BE , we ...
... quadrants , AD , DB , be each divided into 9 equal parts , every one of which will be 10 degrees ; if then from the centre C , lines be drawn through 10 , 20 , 30 , 40 , & c . the divisions of the quadrant BD , and continued to BE , we ...
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ABCD acres altitude Answer arch base bearing centre chains and links circle circumferentor Co-sec Co-tang column compasses contained cube root decimal difference of latitude Dist divided divisions divisor draw east Ecliptic edge EXAMPLE feet field-book figure four-pole chains given angle given number half the sum height Hence Horizon glass hypothenuse inches instrument length logarithm measure Meridian Altitude meridian distance method multiplied natural co-sine natural number natural sine Nonius number of degrees object observed off-sets opposite parallel parallelogram perches perpendicular plane prob PROBLEM proportional protractor Quadrant quotient radius rhombus right angles right line Secant sect semicircle Sextant side square root station subtract Sun's survey taken Tang tangent theo theodolite THEOREM trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence