Practical geometry for the architect, engineer, surveyor and mechanic |
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Page 62
... obtain two more points on the pentagon ; and drawing the diameter LOG , we find the fifth point G. Draw the chords FH , HG , GI , IK , and the pentagon is completed . Bisect the angles FOH , HOG , GOI , IOK , by the lines O M , ON , & c ...
... obtain two more points on the pentagon ; and drawing the diameter LOG , we find the fifth point G. Draw the chords FH , HG , GI , IK , and the pentagon is completed . Bisect the angles FOH , HOG , GOI , IOK , by the lines O M , ON , & c ...
Page 68
... obtained from a cone having a circle for its base , by cutting it with a plane surface ; the nature of the curve ... obtain is called a PARABOLA . Of this curve there are no varieties , there being but one parabola , larger or smaller ...
... obtained from a cone having a circle for its base , by cutting it with a plane surface ; the nature of the curve ... obtain is called a PARABOLA . Of this curve there are no varieties , there being but one parabola , larger or smaller ...
Page 69
Edward Wyndham Tarn. We can obtain an infinite variety of hyperbolas by vary- ing the vertical angle or amount of slope which the cone possesses . In considering , however , these three curves , their con- nection with the cone may be ...
Edward Wyndham Tarn. We can obtain an infinite variety of hyperbolas by vary- ing the vertical angle or amount of slope which the cone possesses . In considering , however , these three curves , their con- nection with the cone may be ...
Page 75
... obtain a contour consisting of a number of arcs of circles varying in curvature which will form a near approach to the outline of an ellipse . The larger the number of points that are taken on the ellipse the nearer will the resulting ...
... obtain a contour consisting of a number of arcs of circles varying in curvature which will form a near approach to the outline of an ellipse . The larger the number of points that are taken on the ellipse the nearer will the resulting ...
Page 81
... obtained for purposes of or- namentation . Fig . 101 . B 120. To apply the ellipse to form the entasis of a column . -Let BC ( fig . 102 ) be the axis of the column , A C its half - diameter at base , BD the half - diameter at summit ...
... obtained for purposes of or- namentation . Fig . 101 . B 120. To apply the ellipse to form the entasis of a column . -Let BC ( fig . 102 ) be the axis of the column , A C its half - diameter at base , BD the half - diameter at summit ...
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Common terms and phrases
A B fig arc cutting arch architectural arcs of circles asymptotes axis Bisect the angle circle cutting circle drawn circumference circumscribed common logarithm CONIC SECTIONS Construction contour convolution cube cuts the axis cutting the circle cycloid describe a circle diameter divide draw an arc draw tangents Draw the chords draw the tangent Edition ellipse engineering entasis figure find points fixed axis flexure foci focus given circle given line given point given.-Let inscribed circles intersecting join lemniscate length line A B LUDGATE HILL mean-proportional measure number of equal number of points ovolo parabola perpendicular Plates point of contrary-flexure pole produce PUBLISHED BY LOCKWOOD radii radius of curvature radius-vector Railway ratio required curve right angles right-line scale Scott Burn sides spiral square Tables touch the given trapezium triangle vertex vertical voussoirs
Popular passages
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