13. One-fourth of the third of the length of the head[47] (I) gives:
The thickness of the canon of the fore-limb: that of the hind-quarter is a little thicker.
[47] That is, one-twelfth of the length of the head.
14. One-third of this same measure[48] (K) equals:
The thickness of the fore-limb close to the knee in its narrowest part.
The thickness of the posterior pasterns, viewed laterally.
[48] That is, a ninth of the length of the head.
15. The height from the elbow to the fold of the knee (L) is the same as:
The height from this same fold to the earth.
The height from the patella to the fold of the ham.