The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtJ.J. Harper, 1828 - 435 páginas |
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Página 7
... Secants Natural Sines · 150 Points of the Compass - 177 Traverse Table - Me- - 187 Of computing the Area of a Survey , geometrically con- sidered and de- monstrated 4. Of Off - Sets Mean Refraction Sun's Parallax · - 246 1 20 · 71 82 83 ...
... Secants Natural Sines · 150 Points of the Compass - 177 Traverse Table - Me- - 187 Of computing the Area of a Survey , geometrically con- sidered and de- monstrated 4. Of Off - Sets Mean Refraction Sun's Parallax · - 246 1 20 · 71 82 83 ...
Página 40
... secant of the arc HB . fig . 8 . 24. What an arc wants of a quadrant is called the complement thereof : Thus DH is ... secant of the complement of any arc , is called the co - sine , co - tangent , or co - secant of the arc itself : thus ...
... secant of the arc HB . fig . 8 . 24. What an arc wants of a quadrant is called the complement thereof : Thus DH is ... secant of the complement of any arc , is called the co - sine , co - tangent , or co - secant of the arc itself : thus ...
Página 54
... secant , and CI its co - secant . Fig . 8 . 1. The co - sine of an arc is to the sine , as the radius is to the tangent . 2. The radius is to the tangent of an arc , as the co - sine of it is to the sine . 3. The sine of an arc is to ...
... secant , and CI its co - secant . Fig . 8 . 1. The co - sine of an arc is to the sine , as the radius is to the tangent . 2. The radius is to the tangent of an arc , as the co - sine of it is to the sine . 3. The sine of an arc is to ...
Página 55
... secant . The triangles CLH and CBK , being similar , ( by theo . 16. ) 1. CL : LH :: CB : BK . 2. Or , CB : BK :: CL : LH . The triangles CFH and CDI , being similar . 3. CF ( or LH ) : FH :: CD : DI . 4. CD : DI :: CF ( or LH ) : FH ...
... secant . The triangles CLH and CBK , being similar , ( by theo . 16. ) 1. CL : LH :: CB : BK . 2. Or , CB : BK :: CL : LH . The triangles CFH and CDI , being similar . 3. CF ( or LH ) : FH :: CD : DI . 4. CD : DI :: CF ( or LH ) : FH ...
Página 62
... secants , with any radius . On the line AB , let a semicircle ADB be described ; let CDF be drawn perpendicular to this line from the centre C ; and the tangent BE perpendicular to the end of the diameter ; let the quadrants , AD , DB ...
... secants , with any radius . On the line AB , let a semicircle ADB be described ; let CDF be drawn perpendicular to this line from the centre C ; and the tangent BE perpendicular to the end of the diameter ; let the quadrants , AD , DB ...
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Términos y frases comunes
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