ial inking devices, the unprinted fingers are
given classifications identical with the classifications of the
fingers opposite. If only one finger is lacking, reference searches
should be conducted in every possible classification. If more than one
finger is lacking, they should be given the classifications of the
opposite fingers, but no reference searches should be conducted. If
there are two lacking, opposite each other, they should be classified
as whorls with meeting tracings.

If, however, in the case of an injured finger, observation is made of
the ridges of the finger itself and indicated on the print, this
classification should be, insofar as it is possible, utilized. For
example, a missing impression labeled "ulnar loop of about 8 counts"
by the individual taking the prints, should be searched in the
subsecondary as both I and O but should not be referenced as a pattern
other than a loop. If the finger is used as the final, or key, it
should be searched enough counts on each side of 8 to allow for
possible error in the counting by the contributor using his naked
eye.

CHAPTER VI

_Filing Sequence_

The sequence must be arranged properly at all times to make possible
the most accurate work. Prints are sequenced and filed in this order,
according to:

I. _Primary:_

1 32.
- to --
1 32

In the primary classification the denominator remains constant until
all numerator figures have been exhausted from 1 to 32. All prints
with the primary 1 over 1 are filed together. These are followed by 2
over 1, 3 over 1, 4 over 1, etc., until 32 over 1 is reached. The next
primary is 1 over 2, then 2 over 2, etc., until 32 over 2 is reached.
Eventually, through the use of each denominator figure and the
elimination of each numerator over each denominator, the 32 over 32
primary will be reached.

Even in the smaller collections of fingerprints, it will be found that
the groups which are arranged under the individual primaries filed in
sequence, from 1 over 1 to 32 over 32, will be too voluminous for
expeditious searching.

II. _Secondary:_

A. Secondary small-letter group:

A rW3r.
- to ----
A rW3r

Most intricate of all the individual sequences is the small-letter
sequence. It is less difficult if the following method is used:

1. Sequence according to the patterns in the index fingers, grouped

A W.
- to -
A W

When small letters are present, there are 25 possible combinati