The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art. With a New Set of Accurate Mathematical TablesHarper, 1832 - 348 σελίδες |
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Σελίδα 19
... perches to the decimal of a mile . 1 mile 5 furlongs 40 8 8 fur . 200 40 = vulgar fraction . 320 320 per . 320 ) 200.0 ( .625 = decimal sought . 192 0 800 640 1600 1600 Reduce 21 minutes 54 seconds to the decimal of a degree . Ans ...
... perches to the decimal of a mile . 1 mile 5 furlongs 40 8 8 fur . 200 40 = vulgar fraction . 320 320 per . 320 ) 200.0 ( .625 = decimal sought . 192 0 800 640 1600 1600 Reduce 21 minutes 54 seconds to the decimal of a degree . Ans ...
Σελίδα 20
... perches in a rood . 14.0000 The value , therefore , is 1 rood 14 perches . What is the value of .6875 of a yard ? 3 = number of feet in a yard . 2.0625 12 number of inches in a foot . .7500 12 = number of lines in an inch . 9.0000 The ...
... perches in a rood . 14.0000 The value , therefore , is 1 rood 14 perches . What is the value of .6875 of a yard ? 3 = number of feet in a yard . 2.0625 12 number of inches in a foot . .7500 12 = number of lines in an inch . 9.0000 The ...
Σελίδα 86
... perches , or miles , & c . and this mark ° , either in an angle or on a side , denotes the angle or side to be required . From these propositions it may be observed , that to find a side , when the angles and one side are given , any ...
... perches , or miles , & c . and this mark ° , either in an angle or on a side , denotes the angle or side to be required . From these propositions it may be observed , that to find a side , when the angles and one side are given , any ...
Σελίδα 96
... perches , < A 33 ° 45 ' ' To find the other two sides . Given , BC 300 Ans . { AB 449 Ex . 2. In the right - angled triangle ABC , the base AB 162 chains , < A 33 ° 45 ' To find the other two sides . SAC 270 Ans . BC 216 * Demonstration ...
... perches , < A 33 ° 45 ' ' To find the other two sides . Given , BC 300 Ans . { AB 449 Ex . 2. In the right - angled triangle ABC , the base AB 162 chains , < A 33 ° 45 ' To find the other two sides . SAC 270 Ans . BC 216 * Demonstration ...
Σελίδα 109
... perches : but be- cause the length of a perch differs in many places , therefore the length of chains and their respectivé links will differ also . The English statute - perch is 5 yards , the two - pole chain is 11 yards , and the four ...
... perches : but be- cause the length of a perch differs in many places , therefore the length of chains and their respectivé links will differ also . The English statute - perch is 5 yards , the two - pole chain is 11 yards , and the four ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD acres altitude arch azimuth base bearing blank line centre chains and links circle circumferentor co-sine column compasses contained cube root decimal diagonal diameter difference of latitude divided divisions divisor draw east ecliptic edge EXAMPLE feet field-book figure four-pole chains geometrical series given angle given number half the sum height Hence horizon glass hypothenuse inches instrument length logarithm manner measure meridian distance method multiplied needle nonius number of degrees object observed offsets opposite parallelogram perches perpendicular plane prob PROBLEM proportion protractor quadrant quotient radius rhombus right angles right line scale of equal SCHOLIUM screw secant sect sector semicircle side square root station stationary distance subtract suppose survey taken tangent theo theodolite THEOREM third trapezium triangle ABC trigonometry two-pole chains vane vulgar fraction whence
Δημοφιλή αποσπάσματα
Σελίδα 173 - In like manner, when it is said, that " triangles on the same base, and between the same parallels, are equal...
Σελίδα 49 - 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.
Σελίδα 163 - RULE. From half the sum of the three sides subtract each side severally.
Σελίδα 41 - 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.
Σελίδα 97 - 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.
Σελίδα 41 - The radius of a circle is a right line drawn from the centre to the circumference.
Σελίδα 52 - Triangles upon equal bases, and between the same parallels, are equal to one another.
Σελίδα 24 - The square of the sum of two numbers is equal to the square of the first number plus twice the product of the first and second number plus the square of the second number.
Σελίδα 35 - DIVISION BY LOGARITHMS. RULE. From the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.