The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtE. Duyckinck, 1811 - 508 من الصفحات |
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الصفحة
... of the Sun Transit of Pole Star ibid 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 PART I. Page . PART II . Page . try CONTENTS .
... of the Sun Transit of Pole Star ibid 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 PART I. Page . PART II . Page . try CONTENTS .
الصفحة
... Dip for Dif . Dist of land Semi - diameter of the Sun Transit of Pole Star ibid 176 263 Difference of Altitude of 7. Method of Dividing Land 8. Maritime Surveying 281 Pole Star and Pole 177 271 Sun's Declination 178 Reduction Table 182.
... Dip for Dif . Dist of land Semi - diameter of the Sun Transit of Pole Star ibid 176 263 Difference of Altitude of 7. Method of Dividing Land 8. Maritime Surveying 281 Pole Star and Pole 177 271 Sun's Declination 178 Reduction Table 182.
الصفحة 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 84 DECIMAL FRACTIONS . 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 84 DECIMAL FRACTIONS . 5.
الصفحة 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 numbers ...
... 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 numbers ...
الصفحة 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 ...
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عبارات ومصطلحات مألوفة
acres altitude Answer arch azimuth base bearing blank line centre chains and links chord circle circumferentor Co-sec Co-tang column compasses contained decimal difference distance line divided divisions draw east Ecliptic edge feet field-book figures fore four-pole chains geom given number half the sum Horizon glass hypothenuse inches instrument Lat Dep Lat latitude length logarithm measure meridian distance multiplied natural co-sine natural sine needle Nonius number of degrees object observed off-sets opposite parallel parallelogram pegs perches perpendicular plane pole pole star Portmarnock PROB protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect Sextant side sights square station stationary distance subtract Sun's survey taken Tang tangent theo theodolite trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence
مقاطع مشهورة
الصفحة 38 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
الصفحة 25 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
الصفحة 197 - RULE. From half the sum of the three sides subtract each side severally.
الصفحة 106 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
الصفحة 27 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc. Thus BA is the versed sine of the arc AG.