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 6 - 10 από τα 38.
Σελίδα 68
... scale and pro- tractor . OF THE SECTOR . Amid the variety of mathematical ... equal rules called legs ; these legs are moveable about the centre of a ... equal parts , one on each leg , marked LIN . or L. Each of these scales , from the ...
... scale and pro- tractor . OF THE SECTOR . Amid the variety of mathematical ... equal rules called legs ; these legs are moveable about the centre of a ... equal parts , one on each leg , marked LIN . or L. Each of these scales , from the ...
Σελίδα 69
... equal angles at the centre , and conse- quently at whatever distance the ... scale . There are on the one face , 1. A line of inches . 2. A line of ... equal parts , numbered 1 , 2 , 3 , to 10 ; these may be called divisions of the first ...
... equal angles at the centre , and conse- quently at whatever distance the ... scale . There are on the one face , 1. A line of inches . 2. A line of ... equal parts , numbered 1 , 2 , 3 , to 10 ; these may be called divisions of the first ...
Σελίδα 72
... equal to two inches ) , re- quired the sine and tangent of 28 ° 30 ′ to that radius . - Solution . Open the sector ... scale of upper tan- gents ; and then the required number 60 ° may be taken from this scale . Given the length of the ...
... equal to two inches ) , re- quired the sine and tangent of 28 ° 30 ′ to that radius . - Solution . Open the sector ... scale of upper tan- gents ; and then the required number 60 ° may be taken from this scale . Given the length of the ...
Σελίδα 73
... scale concerned , and slide the feet along till they both rest on like ... equal to the given radius . Take the transverse distance of the sine ... SCALE . The divisions laid down on the plain scale are of two kinds , the one having moré ...
... scale concerned , and slide the feet along till they both rest on like ... equal to the given radius . Take the transverse distance of the sine ... SCALE . The divisions laid down on the plain scale are of two kinds , the one having moré ...
Σελίδα 74
... scales of equal parts , and are of various lengths for the conve- nience of delineating any figure of a larger or smaller size , ac- cording to the fancy or purposes of the draughtsman . They are , indeed , nothing more than a measure ...
... scales of equal parts , and are of various lengths for the conve- nience of delineating any figure of a larger or smaller size , ac- cording to the fancy or purposes of the draughtsman . They are , indeed , nothing more than a measure ...
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.