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 Joseph Cushing, 1816 - 472 σελίδες |
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Σελίδα x
... manner only ; and the few who have undertaken the theory , have in a great measure omitted the practice . These considerations induced me to attempt a me- thodical , easy , and clear course of Surveying ; how far I have succeeded in it ...
... manner only ; and the few who have undertaken the theory , have in a great measure omitted the practice . These considerations induced me to attempt a me- thodical , easy , and clear course of Surveying ; how far I have succeeded in it ...
Σελίδα 25
... manner proceed , till all the figures of the given square are exhausted . * If there be any decimals in the given square , their number must be even , or made so , before we begin to find the root , by adding a cypher to the right hand ...
... manner proceed , till all the figures of the given square are exhausted . * If there be any decimals in the given square , their number must be even , or made so , before we begin to find the root , by adding a cypher to the right hand ...
Σελίδα 39
... manner CED + AED = 2 right an- gles ; and AED + AEB = 2 right angles ; wherefore taking AED from both , there remains CED - AFB . Q. E. D. THEOREM II . fig . 22 If a right line cross two parallels , I as GH does AB and CD ( fig . 22 ...
... manner CED + AED = 2 right an- gles ; and AED + AEB = 2 right angles ; wherefore taking AED from both , there remains CED - AFB . Q. E. D. THEOREM II . fig . 22 If a right line cross two parallels , I as GH does AB and CD ( fig . 22 ...
Σελίδα 40
... right angles ( by theo . 1. ) There- fore EFD + FEB are equal to two right angles ; after the same manner we prove that AEF + CFE are equal to two right angles . Q. E. D. THEOREM IV . In any triangle ABC , one of 40 THEOREMS ..
... right angles ( by theo . 1. ) There- fore EFD + FEB are equal to two right angles ; after the same manner we prove that AEF + CFE are equal to two right angles . Q. E. D. THEOREM IV . In any triangle ABC , one of 40 THEOREMS ..
Σελίδα 44
... manner BCE is double to CAB , wherefore , BCE + ECD , or BCD is double to BAC + CAD or to BAD . Q. E. D.寮 Cor . 1. Hence an angle at the circumference is mea- sured by half the arc it subtends or stands on . Cor . 2. Hence all angles ...
... manner BCE is double to CAB , wherefore , BCE + ECD , or BCD is double to BAC + CAD or to BAD . Q. E. D.寮 Cor . 1. Hence an angle at the circumference is mea- sured by half the arc it subtends or stands on . Cor . 2. Hence all angles ...
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A Treatise of Practical Surveying: Which is Demonstrated From Its First ... Robert Gibson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2021 |
Συχνά εμφανιζόμενοι όροι και φράσεις
20 perches 50 Dist ABCD acres altitude annexed Answer base bearing bisect blank line centre chains and links chord circle circumferentor Co-secant Secant Co-sine Co-tang column contained cyphers decimal decimal fraction Dep Lat difference 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 magnetical measure meridian distance multiplied needle number of degrees object off-sets parallel parallelogram perpendicular piece of ground plane Portmarnock PROB proportion protractor quotient radius right angles right line scale of equal SCHOLIUM sect semicircle side sights sine square root stationary distance sun's suppose survey taken tance Tang tangent thence theo theodolite THEOREM thro trapezium triangle ABC trigonometry true amplitude true azimuth two-pole chains vane variation whence