Abstract
The second formula of the forearm was worked out from one length and three circumferences of the forearm. The quantitative measurements were as follows :
1) Length of forearm : straight distance from the stylion radiale to the radiale using the direct method of measurement.
2) Circumference I of forearm : largest circumference, hanging upper extremity, of the forearm,
3) Circumference II of forearm : generally termed the middle circumference, of the forearm,
4) Circumference III of forearm : generally termed the smallest circumference of the forearm.
From these quantitative measurements, the following six indices were drawn; namely,
i) Forearm length-circumference index I (= length of forearm ⋅ 100/circumference I of forearm),
ii) Forearm length-circumference index II (= length of forearm ⋅ 100/circumference II of forearm),
iii) Forearm length-circumference index III (= length of forearm ⋅ 100/circumference III of forearm),
iv) Forearm circumference index A (= circumference II of forearm ⋅ 100/circumference I of forearm),
v) Forearm circumference index B (= circumference III of forearm ⋅ 100/circumference I of forearm),
vi) Forearm circumference index C (= circumference III of forearm ⋅ 100/circumference II of forearm) .
These indices were sought from the anthropological ages of many cases of men and women and centered around arithmetical averages of indices ; six types of classifications were made with considerations for standard variations.
These types were symbolized simply one to six which in turn were charted in parallel arrangements in the order of indices LUI LUII LUIII UA UB UC, producing a form which was named the Second Formula of the Forearm.
