The text compares different measurement systems used by famous artists like J.C. Le Blon and A. Durer and discusses the author's own perspective on proportions. It supports the idea of a body consisting of eight heads being proportional to the height of ten faces, emphasizing the conformity to most body parts like arms and thighs. The discussion highlights a standard known from architecture, particularly in creating structures like Caryatids, stressing that it's more about the principle than the terminology.
There is no party, nor any contradiction to the rule, against the predecessors or followers of the two aforementioned very famous masters; nor even against any other method of measurement, as I have adopted above, therefore not at all against the Modules of J. C. LE BLON, nor against the divisions found in A. DURER and elsewhere, it is just that, if not all, at least most writers determine that the face is such a small part of the head that a body of eight heads is truly the height of ten faces; instead of nine and a third, according to my position, which, as it seems to me, will commend itself not only because of its particular conformity with most limbs and parts, (for instance, the arm from the shoulder to the fingertip is four of these faces long, the thigh and the trunk each three,) but also for more other proportions (described more fully below) which the Creator has wanted to take into account in this splendid work; and constantly maintain there. Furthermore, it will be indifferent to me, if someone wants to call the heights for the faces a Module, or to translate them into the Modules and Minutes known in Architecture, for making Caryatids, or column figures, to have the same measure with those of the.
manner of measuring that I adopted above; nor also against the Modules of J. C. LE BLON, nor against the proportions found in A. DURER and elsewhere; although, if not all, at least the majority of writers set the face as such a small part of the head, that a Body of eight Heads is well the height of ten faces; instead of nine and a third following my system, which, except for correction, seems to me the most acceptable, not only because of its particular conformity with most members & parts; for instance, the arm from the shoulder to the fingertip, is the length of four of these faces, the thigh & the trunk three; but also by several other proportions (more fully discussed below) which the Creator has wanted to observe in this masterpiece, & consistently maintains there. Furthermore, it is indifferent to me whether one names my height for faces a Module, or that one transfers it to Modules & Minutes, known in Architecture, to have the same measure with the Pillars & Columns surrounding them; because it is not so much about the name, but about the thing itself.