The greatest thickness of the calf of the leg is at a third of its
height _a b_, and is a twentieth part thicker than the greatest
thickness of the foot.

_a c_ is half of the head, and equal to _d b_ and to the insertion
of the five toes _e f_. _d k_ diminishes one sixth in the leg _g h_.
_g h_ is 1/3 of the head; _m n_ increases one sixth from _a e_ and
is 7/12 of the head, _o p_ is 1/10 less than _d k_ and is 6/17 of
the head. _a_ is at half the distance between _b q_, and is 1/4 of
the man. _r_ is half way between _s_ and _b_[Footnote 11: _b_ is
here and later on measured on the right side of the foot as seen by
the spectator.]. The concavity of the knee outside _r_ is higher
than that inside _a_. The half of the whole height of the leg from
the foot _r_, is half way between the prominence _s_ and the ground
_b_. _v_ is half way between _t_ and _b_. The thickness of the thigh
seen in front is equal to the greatest width of the face, that is
2/3 of the length from the chin to the top of the head; _z r_ is 5/6
of 7 to _v_; _m n_ is equal to 7 _v_ and is 1/4 of _r b_, _x y_ goes
3 times into _r b_, and into _r s_.

[Footnote 22-35: The sketch illustrating these lines is on Pl. XIII,
No. 2.]

[Footnote 22: a b _entra in_ c f 6 _e_ 6 _in_ c n. Accurate
measurement however obliges us to read 7 for 6.] _a b_ goes six
times into _c f_ and six times into _c n_ and is equal to _g h_; _i
k l m_ goes 4 times into _d f_, and 4 times into _d n_ and is 3/7 of
the foot; _p q r s_ goes 3 times into _d f, and 3 times into _b n_;
[Footnote: 25. _y_ is not to be found on the diagram and _x_ occurs
twice; this makes the passage very obscure.] _x y_ is 1/8 of _x f_
and is equal to _n q_. 3 7 is 1/9 of _n f_; 4 5 is 1/10 of _n f_
[Footnote: 22-27. Compare with this lines 18-24 of No. 331, and the
sketch of a leg in profile Pl. XV.].

I want to know how much a man increases in height by standing on
tip-toe and how much _p g_ diminishes by stooping; and how much it
increases at _n q_ likewise in bending the foot.

[Footnote 34: _e f_ 4 _dal cazo_. By reading _i_ for _e_ the sense
of this passage is made clear.] _e f_ is four times in the distance
between the genitals and the sole of the foot; [Footnote 35: 2 is
not to be found in the sketch which renders the passage obscure. The
two last lines are plainly legible in the facsimile.] 3 7 is six
times from 3 to 2 and is equal to _g h_ and _i k_.

[Footnote: The drawing of a leg seen in front Pl. XIII, No. 1
belongs to the text from lines 3-21. The measurements in this
section should be compared with the text No. 331, lines 1-13, and
the sketch of a leg seen in front on Pl. XV.]