Homepage
Login
Profile
BookClubs
dmBox
Read this ebook for free! No credit card needed, absolutely nothing to pay.
Words: 30931 in 11 pages
This is an ebook sharing website. You can read the uploaded ebooks for free here. No credit cards needed, nothing to pay. If you want to own a digital copy of the ebook, or want to read offline with your favorite ebook-reader, then you can choose to buy and download the ebook.
which are too light and faint, or in which the ink has run, obliterating the ridges. The best results will be obtained by using heavy black printer's ink, a paste which should not be thinned before using. This ink will dry quickly and will not blur or smear with handling.
A brief review of the problems of classifying and filing a fingerprint card in the FBI will help to clarify the FBI's policy concerning the processing of "bad" inked fingerprints.
The criminal fingerprint file contains the fingerprints of millions of individuals. The complete classification formula is used. To obtain it, each inked finger must show all the essential characteristics. Because of the immense volume of prints it has become necessary to extend the normal classification formula.
To illustrate this point:
Figures 366 to 377 are some examples of improperly and properly taken inked fingerprints.
An examination of figure 372 shows that it is a whorl. In order to classify the ridge tracing accurately, however, so that the fingerprint card can be placed in the correct classification, the left delta must show. The approximate ridge tracing for the whorl in figure 372 would be MEETING. An examination of the properly taken fingerprint in figure 373 indicates that the correct ridge tracing is INNER. It follows that the pattern in figure 372 would not have been placed in the proper place in file.
The correct whorl tracing is needed to obtain the complete subsecondary and the major classifications.
It may be noted that both deltas are present in figure 374. This would enable the technical expert to ascertain the correct ridge tracing, OUTER. In the core of the whorl, however, there is a heavy amount of ink which makes it impossible to determine the type of whorl with any degree of accuracy. If one were to hazard a guess, it would appear to be a plain whorl. Actually, the correct type of whorl, a double loop, is clearly visible in figure 375.
There are two additional points which illustrate the FBI's need for the delta, ridges, and core to show clearly in loops. The first point is set forth: the ridge count of the loop may be needed to obtain the key classification. The key classification is an actual ridge count, and no valuation table is used to obtain a subdivision. The key classification is used as an integral part of the fingerprint filing system. The second point is as follows: the ridge count may be needed to obtain the final classification. The final classification is an actual ridge count, and no valuation table is used to obtain a subdivision. The final classification is used as an integral part of the fingerprint filing system.
The following are just a few examples to illustrate the completeness of the classification formula used in the FBI fingerprint file:
S 1 R IOI
Key Major Primary Secondary Subsecondary Final
Free books android app tbrJar TBR JAR Read Free books online gutenberg
(0)More posts by @FreeBooks
