Four Books on Human Proportion

A geometric diagram illustrates the proportions for the human arm. A large triangle is formed by a horizontal base line and two converging lines from the left. At the right apex is the letter 'a'. On the left, a vertical line begins at point 'b' and proceeds upwards through points 'e' and 'd'. Beside it, a slanted bar starts at point 'h' and proceeds upwards through points 'f' and 'g'. Horizontal lines connect points 'e' to 'f' and 'd' to 'g'. Diagonal lines from apex 'a' connect to points 'f', 'g', and the top of the slanted bar. The word "Comparator" original: "Vergleicher" is printed within the main body of the triangle.

Afterward, I determine the length of the arm as follows: from the shoulder joint achsselglid: the articulation of the humerus and scapula, which is located at the height of the hollow of the throat halßgrüblein: the suprasternal notch at the base of the neck, to the elbow: it is two-elevenths of the total height.

But from the shoulder joint to the end of the shoulder muscle original: "achsselfleisch," referring here to the deltoid muscle: one-tenth.

From the elbow to the tips of the fingers: one-fourth.

From the tips of the fingers backward to the end of the hand referring to the wrist joint: one-tenth.

However, whoever wishes to do so may make it longer, one-ninth.

The lengths of the limbs glidmaß: the specific segments or members of the body are noted above.