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 11
... bearings of their most remark- able places from each other , it is usually denominated Maritime Surveying . This branch of Surveying , however , demands no other qualifications than those which should be thoroughly acquired by every ...
... bearings of their most remark- able places from each other , it is usually denominated Maritime Surveying . This branch of Surveying , however , demands no other qualifications than those which should be thoroughly acquired by every ...
Σελίδα 122
... bearing of the first stationary line AB , let the line be measured , and the length thereof in chains and links be ... bearings and stationary distances . Having done with your first station , set the instrument over the hole or spot ...
... bearing of the first stationary line AB , let the line be measured , and the length thereof in chains and links be ... bearings and stationary distances . Having done with your first station , set the instrument over the hole or spot ...
Σελίδα 123
... bearings may be taken quite round , and the stationary distances being annexed to them will complete the field - book . But in this last method care must be taken to see that the sights have not the least cast on either side ; if they ...
... bearings may be taken quite round , and the stationary distances being annexed to them will complete the field - book . But in this last method care must be taken to see that the sights have not the least cast on either side ; if they ...
Σελίδα 124
... bearings , as before ; the difference of these bearings , if less than 180 , will be the quantity of degrees contained in the given angle ; but if more take it from 360 , and the remainder will be the degrees contained in the given ...
... bearings , as before ; the difference of these bearings , if less than 180 , will be the quantity of degrees contained in the given angle ; but if more take it from 360 , and the remainder will be the degrees contained in the given ...
Σελίδα 125
... bearing of every stationary distance line from the meridian , as the circumferentor and quartered compass do . To take the angles of the field . PL . 6. fig . 6 . Lay the ends of your index to 360 ° and 180 ° ; turn the whole about with ...
... bearing of every stationary distance line from the meridian , as the circumferentor and quartered compass do . To take the angles of the field . PL . 6. fig . 6 . Lay the ends of your index to 360 ° and 180 ° ; turn the whole about with ...
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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.