From one length and three breadths of the stem, the formula of the stem was originated, of which the quantitative measurements were:
1) Stem-length: the vertical distance to the vertex from the tuberosity of the Ischium, namely, sitting height,
2) Stem-breadth I: maximum head breadth direct distance between the euryon of the right and left sides,
3) Stem-breadth II: breadth of shoulders direct distance between the acromion of the right and left sides,
4) Stem-breadth III: maximum hip breadth direct distance between the most projected hips of the right and left sides.
From these four quantitative measurements, the following six indices were derived:
I) Stem index I (= steam-breadth I. 100/stem-length),
II) Stem index II (= stem-breadth II. 100/stem-length),
III) Stem index III (= stem-breadth III. 100/stem-length),
IV) Stem-breadth index A (= stem-breadth I. 100/stem-breadth II),
V) Stem-breadth index B (= stem-breadth III. 100/stem-breadth II),
VI) Stem-breadth index C (= stem-breadth I. 100/stem-breadth III) .
These indices were sought from the anthropological ages of many cases of men and women, and centered around their respective arithmetical averages; indices were, classified into five or six types taking standard and other factors into consideration.
These types were symbolized simply from one to five or six, which in turn were charted in parallel arrangements in the order of indices I II III A B C, producing a form which was named the Formula of the Stem.