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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... ibid . 6. Changing the scale of Maps Transit of Pole Star 176 263 Difference of Altitude of 7. Method of Dividing Pole Star and Pole 177 Land 271 Sun's Declination 178 8. Maritime Surveying 281 Reduction Table 182 CONTENTS .
... ibid . 6. Changing the scale of Maps Transit of Pole Star 176 263 Difference of Altitude of 7. Method of Dividing Pole Star and Pole 177 Land 271 Sun's Declination 178 8. Maritime Surveying 281 Reduction Table 182 CONTENTS .
Σελίδα 5
... difference exactly under the other two points . EXAMPLES . From 38.765 take 25.3741 25.3741 Difference = 13.3909 From 2.4 take .8472 .8472 Diff . = 1.5528 From 71.45 take 8.4837248 . Difference = 62.9662752 . From DECIMAL FRACTIONS . 5 L.
... difference exactly under the other two points . EXAMPLES . From 38.765 take 25.3741 25.3741 Difference = 13.3909 From 2.4 take .8472 .8472 Diff . = 1.5528 From 71.45 take 8.4837248 . Difference = 62.9662752 . From DECIMAL FRACTIONS . 5 L.
Σελίδα 6
... Difference = 62.9662752 . From 84 take 82.3412 . Diff . 1.6588 . = MULTIPLICATION OF DECIMALS . Set the multiplier under the multiplicand with- out any regard to the situation of the decimal point ; and having multiplied as in whole ...
... Difference = 62.9662752 . From 84 take 82.3412 . Diff . 1.6588 . = MULTIPLICATION OF DECIMALS . Set the multiplier under the multiplicand with- out any regard to the situation of the decimal point ; and having multiplied as in whole ...
Σελίδα 27
... difference of the logarithms , gives the logarithm of the quotient of the numbers : from the two pre- ceding logarithms , and the logarithm of 10 , which is 1 , a great many logarithms can be easily made , as in the following examples ...
... difference of the logarithms , gives the logarithm of the quotient of the numbers : from the two pre- ceding logarithms , and the logarithm of 10 , which is 1 , a great many logarithms can be easily made , as in the following examples ...
Σελίδα 30
... difference must be found , which will be of the same denomination with the greater . Example 1. Required the product of 86.25 multiplied by 6.48 Log . of 86.25 = 1.935759 Log . of 6.48 = 0.811575 Product = 558.9-2.747334 Example 2 ...
... difference must be found , which will be of the same denomination with the greater . Example 1. Required the product of 86.25 multiplied by 6.48 Log . of 86.25 = 1.935759 Log . of 6.48 = 0.811575 Product = 558.9-2.747334 Example 2 ...
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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