Proportion, or, The geometric principle of beauty, analysed (1843)
Hay, D. R. (David Ramsay), 1798-1866 · Edinburgh and London, W. Blackwood and Sons · leaf 49
GEOMETRIC PRINCIPLE OF BEAUTY ANALYSED. 33 secondary to the circle, should be an ellipse proportioned to the secondaries of the other two primary figures ; that is, it ought to be capable of inscribing the rhombus in such a manner, that the vertices of the angles of that figure should cut Fig. 24. … in figure 24. The other peculiarities of this figure, as well as those of the other secondaries, will be noticed hereafter. Fig. 25. When the circumference of such an ellipse is divided into twelve parts, and lines produced within it as shown in figure 25, it will be found that a secondary series…
Proportion (Art)
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Preclarissimũ opus elemento[rum]](https://img.insideoutlibrary.com/img/200/ia-gri_000033125009354198-231-0.webp)