A Treatise on Practical Surveying: Which is Demonstrated from Its First Principles : Wherein Every Thing that is Useful and Curious in that Art, is Fully Considered and ExplainedF. Lucas, jun. and Cushing & Jewett, J. Robinson printer, 1822 - 326 páginas |
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Resultados 1-5 de 21
Página 62
... foot in F , describe the arc AE , and with the like interval and one foot in A , describe the arc BF , making BF = AE ; thro ' A and B draw the line AB , and will be parallel to CD . By prob . 2. The angle BAF ÷ AFE , and by theo . 11 ...
... foot in F , describe the arc AE , and with the like interval and one foot in A , describe the arc BF , making BF = AE ; thro ' A and B draw the line AB , and will be parallel to CD . By prob . 2. The angle BAF ÷ AFE , and by theo . 11 ...
Página 86
... foot of the page , according as they are less or greater than 45 , and in the proper side column for the odd minutes , if there be any ; then below or above the word sine , tangent or secant , and on the same line with the minutes , we ...
... foot of the page , according as they are less or greater than 45 , and in the proper side column for the odd minutes , if there be any ; then below or above the word sine , tangent or secant , and on the same line with the minutes , we ...
Página 87
... foot of the page ( because the proposed degrees are more than 45. ) for 54 degrees , and in the right hand column for 30 minutes ; then in the column marked tangent at its bottom , and on the same line with the 30 minutes , in the side ...
... foot of the page ( because the proposed degrees are more than 45. ) for 54 degrees , and in the right hand column for 30 minutes ; then in the column marked tangent at its bottom , and on the same line with the 30 minutes , in the side ...
Página 105
... foot of the compass , in A , cross the perpendicular line in C ; and the triangle is constructed . By prob . 17. sect . 1. Measure the angle A , and let BC be measured from the same scale of equal parts that AC and AB were taken from ...
... foot of the compass , in A , cross the perpendicular line in C ; and the triangle is constructed . By prob . 17. sect . 1. Measure the angle A , and let BC be measured from the same scale of equal parts that AC and AB were taken from ...
Página 115
... foot in B , describe the arc DC to cut the last blank line in the points D and C. Now if the angle C had been required obtuse , lines from D to B , and to A would constitute the triangle ; but as it is required acute , draw the lines ...
... foot in B , describe the arc DC to cut the last blank line in the points D and C. Now if the angle C had been required obtuse , lines from D to B , and to A would constitute the triangle ; but as it is required acute , draw the lines ...
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A Treatise of Practical Surveying: Which is Demonstrated From Its First ... Robert Gibson Sin vista previa disponible - 2021 |
Términos y frases comunes
20 perches ABCD acres altitude Answer base bearing blank line centre chains and links chord circle circumferentor Co-secant co-sine Co-tang column compass contained cyphers decimal decimal fraction difference Dist divided divisor draw east edge EXAMPLE feet field-book figures four-pole chains given angle half the sum height Hence hypothenuse inches instrument latitude length logarithm measure meridian distance multiplied needle number of degrees object off-sets opposite parallel parallelogram perpendicular piece of ground plane polygon Portmarnock PROB proportion protractor quotient radius right angles right line scale of equal SCHOLIUM secant second station sect semicircle side sights sine square root stationary distance stationary line sun's suppose survey taken tang tangent thence theo theodolite THEOREM thro triangle ABC trigonometry true amplitude true azimuth two-pole chains vane variation whence