into detail, it should be noted that
after the primary is obtained the entire remaining portion of the
classification formula is based upon the arrangement of the
impressions appearing in the right hand as the numerator over the
impressions appearing in the left hand as the denominator. The
arrangement of the even over the uneven fingers is discarded after the
primary is obtained. The secondary classification appears just to the
right of the fractional numerals which represent the primary. It is
shown in the formula by capital letters representing the basic types
of patterns appearing in the index fingers of each hand, that of the
right hand being the numerator and that of the left hand being the
denominator (fig. 348). There are five basic types of patterns which
can appear.

1. Arch A
2. Tented Arch T
3. Radial Loop R
4. Ulnar Loop U
5. Whorl W

[Illustration: 349]

LEAVE THIS SPACE BLANK| |SEX
+--------------+ | |__________
|FBI No. | | |RACE
+--------------+ |LAST NAME FIRST NAME MIDDLE NAME|
-----------------------------|----------------------------------+----------
SIGNATURE OF PERSON |CONTRIBUTOR |ALIASES |HT. |WT.
FINGERPRINTED |AND ADDRESS | |(IN.)|
| | |_____|____
| | |DATE OF
-----------------------------| | |BIRTH
RESIDENCE OF PERSON | | |__________
FINGERPRINTED | | |HAIR |EYES
| | | |
-----------------------------|---------------------------------------------
OCCUPATION |ARREST NUMBER|LEAVE THIS SPACE BLANK
| |
-----------------------------|-------------|
SCARS AND MARKS |PLACE OF |
|BIRTH | 1 R
|-------------|CLASS__________________________
-----------------------------|CITIZENSHIP | 1 aU
SIGNATURE OF OFFICIAL |DATE | _ |
TAKING FINGERPRINTS | ||_|CH