A Treatise on Practical Surveying: Which is Demonstrated from Its First Principles. Wherein Everything that is Useful and Curious in that Art, is Fully Considered and ExplainedF. Lucas and Joseph Cushing, 1818 - 478 σελίδες |
Αναζήτηση στο βιβλίο
Αποτελέσματα 6 - 10 από τα 45.
Σελίδα 100
... Scale . On this scale there are lines of numbers , sines , and tangents , as well as lines of sine and tangent rhombs , versed sines , meridional parts , and equal parts ; but the three first lines are sufficient for our present pur ...
... Scale . On this scale there are lines of numbers , sines , and tangents , as well as lines of sine and tangent rhombs , versed sines , meridional parts , and equal parts ; but the three first lines are sufficient for our present pur ...
Σελίδα 101
... scale ; where there are small brass centres , usually placed to preserve the scale . It was said before , that the tangents ended at 45 ° ; but because the logarithms of tangents more than 45 ° , must pass off the scale ; such distances ...
... scale ; where there are small brass centres , usually placed to preserve the scale . It was said before , that the tangents ended at 45 ° ; but because the logarithms of tangents more than 45 ° , must pass off the scale ; such distances ...
Σελίδα 102
... scale ; for every thing requisite can be performed without them . Thus the two first statings of this case , answer the question without a secant : the like will be also made evident in all the following cases . CASE II . " The base and ...
... scale ; for every thing requisite can be performed without them . Thus the two first statings of this case , answer the question without a secant : the like will be also made evident in all the following cases . CASE II . " The base and ...
Σελίδα 105
... scale of equal parts , lay 300 from A to B on B erect an infinite blank perpendicular line , with AC 500 , from the same scale , and one foot of the com pass , in A , cross the perpendicular line in C ; and the triangle is constructed ...
... scale of equal parts , lay 300 from A to B on B erect an infinite blank perpendicular line , with AC 500 , from the same scale , and one foot of the com pass , in A , cross the perpendicular line in C ; and the triangle is constructed ...
Σελίδα 106
... Scale . 1. Making AC the radius . Extend from 500 to 300 , on the line of numbers ; that extent will reach from 90 ° , on the line of sines , to 36 ° 52 ' for the angle C. Again , Extend from 90 ° to 53 ° 08 ′ , on the line of sines ...
... Scale . 1. Making AC the radius . Extend from 500 to 300 , on the line of numbers ; that extent will reach from 90 ° , on the line of sines , to 36 ° 52 ' for the angle C. Again , Extend from 90 ° to 53 ° 08 ′ , on the line of sines ...
Άλλες εκδόσεις - Προβολή όλων
A Treatise of Practical Surveying: Which is Demonstrated From Its First ... Robert Gibson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2021 |
Συχνά εμφανιζόμενοι όροι και φράσεις
40 perches ABCD acres altitude Answer base bearing blank line centre chains and links chord circle circumferentor Co-secant Secant Co-sine Co-tang column compass complement contained cyphers decimal decimal fraction Dep Lat difference Dist divided divisor draw east edge EXAMPLE feet field-book figures four-pole chains half the sum height Hence hypothenuse inches instrument Lat Dep latitude length logarithm measure meridian distance multiplied needle number of degrees object off-sets parallel parallelogram perpendicular piece of ground plane pole polygon Portmarnock PROB proportion protractor quotient radius right angles right line scale of equal SCHOLIUM second station sect semicircle side sights sine square root stationary distance stationary line sun's suppose survey taken Tang thence theo theodolite THEOREM thro triangle ABC trigonometry true azimuth two-pole chains vane variation
Δημοφιλή αποσπάσματα
Σελίδα 42 - 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 99 - ... on a side, denotes its length to be given in feet, yards, 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 proportions it may be observed ; that to find a side, when the angles and one side are given, any side may be made the radius; and to find an angle, one of the given sides must be made the radius. So that in the 1st, 2d, and 3d cases, any side as well required as given may be made the radius, and in the first statings...
Σελίδα 46 - Triangles upon equal bases, and between the same parallels, are equal to one another.
Σελίδα 93 - 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 114 - 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 4 - POMEROY, of the said District, hath deposited in this Office the title of a Book, the right whereof he claims as Proprietor, in the words following, to wit : . . "Biography of the Signers to the Declaration of Independence.
Σελίδα 48 - The hypothenuse of a right-angled triangle may be found by having the other two sides ; thus, the square root of the sum of the squares of the base and perpendicular, will be the hypothenuse. Cor. 2. Having the hypothenuse and one side given to find the other; the square root of the difference of the squares of the hypothenuse and given side will be the required side.
Σελίδα 115 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Σελίδα 175 - ... the two cardinal points of your compass the point of the needle lies between (the north, south, east, and west being called the four cardinal points, and are graved on the bottom of the box), putting down those points together by their initial letters, and thereto annexing the number of degrees, counting from the north or south, as before, thus ; if the point of your needle lies between the north and east, north and west, south and east, or south and west points in the bottom of the box, then...
Σελίδα 282 - But if one corner cannot be seen from the other, run the line according to the given bearing, and observe the nearest distance between the line so run and the corner: then...