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 7
... Off - Sets Mean Refraction Sun's Parallax · - 246 1 20 · 71 82 83 174 175 · ib . 176 - 177 178 182 Dip of the Horizon Dip for Dif . Dist . of land Semi - Diameter of the Sun Transit of Pole Star Difference of Altitude of Pole - · 192 ...
... Off - Sets Mean Refraction Sun's Parallax · - 246 1 20 · 71 82 83 174 175 · ib . 176 - 177 178 182 Dip of the Horizon Dip for Dif . Dist . of land Semi - Diameter of the Sun Transit of Pole Star Difference of Altitude of Pole - · 192 ...
Σελίδα 12
... Set the multiplier under the multiplicand without any regard to the situation of the decimal point ; and having multiplied as in whole numbers , cut off as many places for decimals in the product , counting from the right hand towards ...
... Set the multiplier under the multiplicand without any regard to the situation of the decimal point ; and having multiplied as in whole numbers , cut off as many places for decimals in the product , counting from the right hand towards ...
Σελίδα 56
... set off equal distances AE , AD , then , with any distance more than the half of DE , describe two arcs to cut each other in some point F ; and the right line AF , joining the points A and F , will bisect the given angle BAC . For if DF ...
... set off equal distances AE , AD , then , with any distance more than the half of DE , describe two arcs to cut each other in some point F ; and the right line AF , joining the points A and F , will bisect the given angle BAC . For if DF ...
Σελίδα 65
... set , will draw a line of any assigned thickness . One of the blades is ... away . These directions are equally applicable to the ink point of the compasses , only ... off divisions from the plotting scale , and protractor . OF THE SECTOR ...
... set , will draw a line of any assigned thickness . One of the blades is ... away . These directions are equally applicable to the ink point of the compasses , only ... off divisions from the plotting scale , and protractor . OF THE SECTOR ...
Σελίδα 69
... Set off the radius . 3. Set off the chord of 57 degrees backwards , which will give the arc of three degrees . Given the radius of a circle , ( suppose equal to two inches , ) required the sine and tangent of 28 ° 30 ' to that radius ...
... Set off the radius . 3. Set off the chord of 57 degrees backwards , which will give the arc of three degrees . Given the radius of a circle , ( suppose equal to two inches , ) required the sine and tangent of 28 ° 30 ' to that radius ...
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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