This height, whether on the right or left, with points represented here by points A and C, lines are drawn to this meeting point until they meet the line DE. We thus have the square here represented by ACDE. We divide the line AC into three equal parts by points F, G, and from these points, lines are drawn to the meeting point. Then, the diagonal CD is drawn, providing the meeting points a, b. From these meeting points, horizontal lines are drawn, and we have the three divisions represented here by Ca, ab, bD, which are the same as divisions CD, DE, EF in fig. 1, plate 27, with the difference that these divisions, being seen geometrically, are equal; whereas, when seen in perspective, they appear much narrower and uneven; because the first division being closer to the observer seems larger than the second, and for the same reason, the second seems larger than the third. Now, if we compare this front view of the foot with the profile view, we will see that Ca, plate 28, fig. 1, is the same as CD, plate 27, fig. 1, that ab is the same division as DE and bD the same as EF.

Once the three divisions of the foot's length are found, here are the other proportions of the front view of the foot. The largest width of the foot is equal to one and a half parts. Fig. 1, plate #8, No representing the width PR of the foot, equal to HM, or one and a half parts. The width of the thumb occupies a third of NO, and the four fingers along with the gap between the thumb and the first finger occupy the other two-thirds. There is always a distance between the thumb and the first finger, with the other fingers touching each other.

The width of the base of the leg seen from the front at its thinnest point is equal to one part. Here, TU equals JE, or one part taken vertically below the leg, because if taken on the scale HL, which is much closer, it would be false. From V to Y there is slightly more than one part.

Regarding the apparent length of the foot and its height at the articulation of the ankle, both depend on the observer's height, and are easily found by using the scale AC on the observer's eye.

It was seen on plate 27, fig. 1, that ba, the height of the foot, had a third of the foot's length or one and a third parts starting from the ground a. The point Z, fig. 1, plate 28, is the same as point a, fig. 1, plate 27. Point b, plate 28, is the same as point b, plate 27. The line bd, plate 28 is extended. From a chosen point J on the extension of bd, we take a height JZ, equal to ad, which is to say one part and a third, or a third of the foot's length. Once these proportions are found, one draws the mass of the foot, then the forms. Here, one sees how much lower the inner ankle (malleolus) is compared to the outer ankle.

The last phalanges, which in nature are the smallest, appear in this position either larger or at least as large as the first ones, because they are closer to the observer.

The contours of the nails seen face-on seem to describe fragments of circles. The same goes for the joints of the phalanges, which appear to envelop one another, as can be seen in figure 2, where we have drawn the bones so that one might better understand the construction of the foot and fingers.

We have drawn larger, fig. 3, a fragment of the front view of the foot so that one can better study the construction of the fingers.

Figure 4 shows a foot seen from behind. To find the foreshortening of this foot, the same scale is used as for figure 1. This scale provides the three divisions of the short or perspective view of the foot.

Figure 5 shows the construction of the foot represented in fig. 4. The proportions, regarding length, are like those of the foot seen from the front.

Figure 6 represents a foot seen from the front standing only on the toes, commonly said on tiptoe. In this position, the length of the foot from A to B appears much larger; it is almost as if only the toes are seen foreshortened; the foot, being almost vertical, is almost imperceptibly foreshortened.

Translation Notes:

"Malleolus" refers to the rounded bony projection on each side of the ankle joint. "Foreshortened" (\"raccourci\") is a technique used in perspective to represent an object or figure in a picture in depth.