A practical treatise on ... land and engineering surveying, Volume 341863 |
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Page 32
... middle of a line , Fig . 7 . From A with any radius describe the arc bc ; with the same radius describe the arcs intersecting each other at d ; draw the line A d , the perpendicular required . Note . - Perpendiculars are more readily ...
... middle of a line , Fig . 7 . From A with any radius describe the arc bc ; with the same radius describe the arcs intersecting each other at d ; draw the line A d , the perpendicular required . Note . - Perpendiculars are more readily ...
Page 33
... middle , as E is the angle of AED or BED , Fig . 16a . An angle is the inclination of two lines meeting in a point called the vertex , and is of a certain number of degrees , or part of the circumference of a circle . Angles are of ...
... middle , as E is the angle of AED or BED , Fig . 16a . An angle is the inclination of two lines meeting in a point called the vertex , and is of a certain number of degrees , or part of the circumference of a circle . Angles are of ...
Page 43
... middle point B draw the chords B A and BC ; bisect these chords and draw the lines n O , m 0 ; from O , with the radius O A , O B , O C , describe the circle required . Problem 45 . To draw a tangent to a given circle , to pass through ...
... middle point B draw the chords B A and BC ; bisect these chords and draw the lines n O , m 0 ; from O , with the radius O A , O B , O C , describe the circle required . Problem 45 . To draw a tangent to a given circle , to pass through ...
Page 45
... middle point will be assumed as correct . Each 60 ° may next be trisected by setting off the natural sine 10 ° , equal the chord of 20 ° to our radius , which will divide the circle to every 10 degrees . The natural sine of 7 ° 30 ...
... middle point will be assumed as correct . Each 60 ° may next be trisected by setting off the natural sine 10 ° , equal the chord of 20 ° to our radius , which will divide the circle to every 10 degrees . The natural sine of 7 ° 30 ...
Page 48
... middle of each side draw the lines O A , O C , O D , O E , and O B ; through the point n draw the tangent A B , meeting OA and O B in A and B ; through the points A and m , draw the line Am C , meeting O C in C ; in like manner draw the ...
... middle of each side draw the lines O A , O C , O D , O E , and O B ; through the point n draw the tangent A B , meeting OA and O B in A and B ; through the points A and m , draw the line Am C , meeting O C in C ; in like manner draw the ...
Autres éditions - Tout afficher
A Practical Treatise on ... Land and Engineering Surveying Henry S. Merrett Aucun aperçu disponible - 2015 |
A Practical Treatise On ... Land and Engineering Surveying Henry S Merrett Aucun aperçu disponible - 2018 |
Expressions et termes fréquents
A B C acres adjustment base line bubble calculated centre chain lines chord circle circumference circumferentor collimation column compass correct cross sections cube yards curve datum line described diameter Diff difference Ditto divided divisions draw the line equal fence field-book fifth column figure find the area fixed flag fore sights frustrum given ground height horizontal inches and decimals inclosure instrument intersecting length line A B logarithm manner mark measure method minutes multiply needle object Offsets in inches parallel plate parallelogram pencil perpendicular plotted poles Problem protractor quantity quotient Radius in chains right angles roods Rule scale secant sector segment sextant side A B sine slopes spirit level square links staff station straight edge subtract surface survey surveyor TABLE take the angle tangent points telescope theodolite tie line tracing paper transverse distance trapezium triangle vernier vertical whole
Fréquemment cités
Page 102 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Page 66 - ... the rail; multiply the length by the breadth and the product by the height; then divide the product by two, and you have the number of bushels of shelled corn in the crib.