Proportion, or, The geometric principle of beauty, analysed (1843)
Hay, D. R. (David Ramsay), 1798-1866 · Edinburgh and London, W. Blackwood and Sons · leaf 37
GEOMETRIC PRINCIPLE OF BEAUTY ANALYSED. 2 J into 60th parts, called minutes ; these, again, into 60 seconds, and these seconds into 60 thirds ; and this subdivision may be carried on to any imaginable extent. The circle is divided into two equal parts by a line drawn through its centre, and cutting… … when horizontally placed, is the base or groundwork from which all angles arise. The half of the circle is called a semicircle, and the half of the semicircle a quadrant. Any line drawn from the centre of this diameter to the circumference of the semicircle is a radius, and will divide it into two…
Proportion (Art)
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Vnderweysung der Messung : mit dem Zirkel vn[d] Richtscheyt in Linien, Ebnen vnnd gantzen Corporen (1525)](https://img.insideoutlibrary.com/img/200/ia-vnderweysungderm00drer-60-122.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten02unit-150-58.webp)
