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 |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 6.
Σελίδα 7
... azimuth compass , and its use . In this edition is introduced a new set of accurate Mathematical Tables . Truth calls upon me to acknowledge , that the methods . of calculation herein set forth got their rise from those of the late ...
... azimuth compass , and its use . In this edition is introduced a new set of accurate Mathematical Tables . Truth calls upon me to acknowledge , that the methods . of calculation herein set forth got their rise from those of the late ...
Σελίδα 136
... azimuth compass . One or two boat compasses . Besides these , a number of measuring rods , iron pins , or ar- rows , & c . will be found very convenient , and two or three off- set staves , which are straight pieces of wood six feet ...
... azimuth compass . One or two boat compasses . Besides these , a number of measuring rods , iron pins , or ar- rows , & c . will be found very convenient , and two or three off- set staves , which are straight pieces of wood six feet ...
Σελίδα 243
... azimuth is found by calculation , and the mag- netic amplitude or azimuth by an azimuth compass . The magnetic amplitude or azimuth of the sun , or any celestial object , may be accurately observed by Mr. M'Culloch's patent compass , of ...
... azimuth is found by calculation , and the mag- netic amplitude or azimuth by an azimuth compass . The magnetic amplitude or azimuth of the sun , or any celestial object , may be accurately observed by Mr. M'Culloch's patent compass , of ...
Σελίδα 244
... azimuth is completed , and hence the degrees and parts of a degree may be read off at leisure with certainty ; 7 is a convex glass , to assist the eye in reading off the observed amplitude or azimuth . To observe the sun's amplitude ...
... azimuth is completed , and hence the degrees and parts of a degree may be read off at leisure with certainty ; 7 is a convex glass , to assist the eye in reading off the observed amplitude or azimuth . To observe the sun's amplitude ...
Σελίδα 245
... azimuth . RULE . - 1 . Reduce the sun's declination to the time and place of observation , and compute the true altitude of the sun's centre . 2. Subtract the sun's declination from 90 ° when the latitude and declination are of the same ...
... azimuth . RULE . - 1 . Reduce the sun's declination to the time and place of observation , and compute the true altitude of the sun's centre . 2. Subtract the sun's declination from 90 ° when the latitude and declination are of the same ...
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.