The Major is taken from the thumbs.
The Major is brought up to the classification line to the left of the primary.
Number six finger has only one set of values as a loop; it is always constant.
Number one finger has two sets of values as a loop.
Number six finger is used as the denominator. Number one finger is used as the numerator.
In a combination of loop and whorl, the first set of values is always used for the number one finger.
If whorls are present in both thumbs, the tracings are used.
A small letter (a, t, r) present in either or both thumbs eliminates the Major.