Universitätsbibliothek HeidelbergUniversitätsbibliothek Heidelberg
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Pennethorne, John; Robinson, John [Ill.]
The geometry and optics of ancient architecture: illustrated by examples from Thebes, Athens, and Rome — London [u.a.], 1878

DOI Page / Citation link:
https://doi.org/10.11588/diglit.4423#0217
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THE COLUMNS, 163

horizontal lines are executed as straight lines, instead of delicate curves, then the axes of the
Columns become vertical lines, and the inclinations of the Columns quite disappear.

The curvature of the horizontal lines, combined with the varying inclinations of the
shafts of the Doric Columns, rendered it necessary that mathematical accuracy should be
observed in the execution and in the fitting of each block of marble used in the Columns in the
Entablatures, and in the Steps, for none of the angles were right angles, and each stone was
required to express the design in the marble, and a working drawing for each separate Column
as shown in Plate XV., Fig. 5, had to be traced upon three co-ordinate rectangular planes,
XY, XZ, YZ, to show the true dimensions of each block of marble composing the Column.

THE END OF PART FOUR,
 
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