A Treatise of Practical Surveying, ...1808 - 440 sider |
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Side
... set forth , got their rise from those of the late Thomas Burgh , esq . who first discovered an universal method for ... off - sets , and the method of casting them up by the pen the nature and application of enlarging , diminishing ...
... set forth , got their rise from those of the late Thomas Burgh , esq . who first discovered an universal method for ... off - sets , and the method of casting them up by the pen the nature and application of enlarging , diminishing ...
Side 47
... set off equal distances AE - AD , then , with any dis- tance more than the half of DE , describe two arcs to cut each other in some point F ; and the right- line AF , joining the points A and F , will bisect the given angle BAC . For if ...
... set off equal distances AE - AD , then , with any dis- tance more than the half of DE , describe two arcs to cut each other in some point F ; and the right- line AF , joining the points A and F , will bisect the given angle BAC . For if ...
Side 58
... set off any given distance from any scale . OF OF LOGARITHM S. F to a series of numbers in 58 GEOMETRICAL.
... set off any given distance from any scale . OF OF LOGARITHM S. F to a series of numbers in 58 GEOMETRICAL.
Side 83
... off the scale ; such distances therefore , as exceed 45 ° , are set backwards from 45 , and numbered 50 , 60 , 70 , & c . , There is no line of secants on the scale ; for every thing requisite can be performed without them . Thus the ...
... off the scale ; such distances therefore , as exceed 45 ° , are set backwards from 45 , and numbered 50 , 60 , 70 , & c . , There is no line of secants on the scale ; for every thing requisite can be performed without them . Thus the ...
Side 114
... off the stationa- ry distance 87 , from A to B ; from B set off your first ; and from A , your second angle ; from C , the point of intersection of the lines which form these angles , let fall the perpendicular CD ; and that will be the ...
... off the stationa- ry distance 87 , from A to B ; from B set off your first ; and from A , your second angle ; from C , the point of intersection of the lines which form these angles , let fall the perpendicular CD ; and that will be the ...
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A Treatise of Practical Surveying: Which is Demonstrated from Its First ... Robert Gibson Uten tilgangsbegrensning - 1806 |
Vanlige uttrykk og setninger
40 perches ABCD acres altitude Answer base bearing blank line centre chains and links chord circle circumferentor Co-fecant Secant Co-fine Co-tang column contained cyphers decimal decimal fraction diameter difference Dift Diſt distance line divided draw drawn east edge EXAMPLE feet field-book figures fore four-pole chains half the sum height hypothenuse inches instrument latitude logarithm measure meridian distance method multiplied needle number of degrees object off-sets parallel parallelogram perpendicular piece of ground plane Plate pole Portmarnock PROB protractor quotient radius right angles right line scale of equal second station sect semicircle side sights sine square root stationary distance stationary line sun's survey taken tangent thence theo theodolite thro trapezium triangle ABC trigonometry true amplitude two-pole chains vane variation Vulgar Fraction whence ΙΟ
Populære avsnitt
Side 32 - 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.
Side 199 - ... that triangles on the same base and between the same parallels are equal...
Side 94 - 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.
Side 23 - Four quantities are said to be in proportion when the product of the extremes is equal to that of the means : thus if A multiplied by D, be equal to B multiplied by C, then A is said to be to B as C is to D.
Side 95 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Side 37 - ABDE+ACGF the sum of the squares —BKLH-\-KCML, the sum of the two parallelograms or square BCMH; therefore the sum of the squares on AB and AC is equal to the square on BC.
Side 24 - Things that are equal to one and the same thing, are equal to each other. 2. Every whole is greater than its part. % 3. Every whole is equal to all its parts taken together. 4 If to equal things, equal things be added, the whole will be equal. 5. If from equal things, equal things be deducted the remainders will be equal.
Side 36 - XIII. •All parallelograms on the same or equal bases and between the same parallels...
Side 182 - VI. To find the content of a triangular piece of ground, Multiply the base by half the perpendicular, or the perpendicular by half the base ; or take half the product of the base into the perpendicular. The reason hereof is plain, from cor.
Side 35 - Triangles upon equal bases, and between the same parallels, are equal to one another.