. Personal identification; methods for the identification of individuals, living or dead. the short projection from the loop, theleft-hand ridge of the loop would be selected as the core, and the patternwould be classed as a Radial Loop with a ridge count of 1, similar toPlate I, d; but with this projection there is formed on the loop itself afigure like a delta, and, if we follow the rule for double deltas, selecting thisas the delta to count from, there would be no intervening ridge betweenthat and the core. According to this interpretation the figure would be Finger Prints; Description and
. Personal identification; methods for the identification of individuals, living or dead. the short projection from the loop, theleft-hand ridge of the loop would be selected as the core, and the patternwould be classed as a Radial Loop with a ridge count of 1, similar toPlate I, d; but with this projection there is formed on the loop itself afigure like a delta, and, if we follow the rule for double deltas, selecting thisas the delta to count from, there would be no intervening ridge betweenthat and the core. According to this interpretation the figure would be Finger Prints; Description and Classification 199 an Arch. While there seems to be some support for this view, the authorsincline to recognize the pattern as a loop, that has degenerated almost tothe point of being an Arch. A strict adherence to the rules for locating core and delta, and therule that, if even one ridge intervenes, the pattern is a Loop, will usuallybe sufficient to decide in difficult cases; but here, as elsewhere, in transitionand other doubtful cases, the alternate possibility may be expressed by. Figure 82. The central part of a disputed pat-tern, enlarged 8 diameters. If the short branchprojecting from the innermost loop makes, with theloop, a delta, then the pattern is an Arch, approximat-ing a Radial loop; code word, ABLE. If the fork onthe next ridge to the right is the delta, then thepattern is a loop, approximating an Arch, with a ridgecount of 1; code word, RIB. an exponent letter, and the search may be made in the files in both places. Certain casics of Ulnar Loops form the subjet^t of a careful analysisin Chapter IX, and the ridge count is clearly shown in both photographsand diagrams. In Loops a ridge count as high as 38 has been observed,although the average falls at about 10, varying in the different method of using this average, in dividing Loops into two approximatelyequal groups, is explained under Classification, farther on in this chapter. Aside from the usual f
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