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 páginas |
Dentro del libro
Resultados 1-5 de 91
Página 29
... drawn between any two points , as the line AB . If it be not the shortest , it is then call- ed a curve line , as AB . fig . 2 . 6. A superfices , or surface , is that which has length and breadth , without thickness , as ABCD . fig . 3 ...
... drawn between any two points , as the line AB . If it be not the shortest , it is then call- ed a curve line , as AB . fig . 2 . 6. A superfices , or surface , is that which has length and breadth , without thickness , as ABCD . fig . 3 ...
Página 31
... drawn thro ' the centre , and terminated on both sides by the circum- ference ; and it divides the circle and circumference in- to two equal parts called semicircles ; and is double the radius , as AB or DE , fig . 8 . 17. Parallel ...
... drawn thro ' the centre , and terminated on both sides by the circum- ference ; and it divides the circle and circumference in- to two equal parts called semicircles ; and is double the radius , as AB or DE , fig . 8 . 17. Parallel ...
Página 33
... drawn from the vertex to the base perpendicu- larly thus if the triangle ABC , be proposed , and BC be made its base , then if from the vertex A the per- pendicular AD be drawn to BC , the line AD will be the height of the triangle ABC ...
... drawn from the vertex to the base perpendicu- larly thus if the triangle ABC , be proposed , and BC be made its base , then if from the vertex A the per- pendicular AD be drawn to BC , the line AD will be the height of the triangle ABC ...
Página 35
... drawn from any one given point to another . 2. That a right line may be produced or continued at pleasure . 3. That from any centre and with any radius , the circumference of a circle may be described . 4. It is also required that the ...
... drawn from any one given point to another . 2. That a right line may be produced or continued at pleasure . 3. That from any centre and with any radius , the circumference of a circle may be described . 4. It is also required that the ...
Página 41
... drawn parallel to AB ; then since BD cuts the two parallel lines BA , CE ; the angle ECD B ( by part 3. of the last theo . ) and again , since AC cuts the same parallels , the angle ACE - A ( by part 2. of the last . ) Therefore ECD + ...
... drawn parallel to AB ; then since BD cuts the two parallel lines BA , CE ; the angle ECD B ( by part 3. of the last theo . ) and again , since AC cuts the same parallels , the angle ACE - A ( by part 2. of the last . ) Therefore ECD + ...
Otras ediciones - Ver todas
A Treatise of Practical Surveying: Which is Demonstrated From Its First ... Robert Gibson Sin vista previa disponible - 2021 |
Términos y frases comunes
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