The Finger Print Instructor; A Text Book for Guidance of Finger Print Experts and an Instructor for Persons Interested in the Study of Finger Prints - Softcover

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1921 Excerpt: ...already occupied, as the result of filing by the use of the key; thus the value of 1 was given as the numerator and the denominator, and the impressions filed under the primary classification y, the numerator representing the vertical file and the denominator the horizontal file. 5 The same rule applies to all primary classifications, y representing the fifth vertical file or compartment-and the 32 seventeenth horizontal compartment, and 55 would thus fall in the compartment in the extreme lower right hand corner of the cabinet, or diagonally opposite to the y prints. Inverting the Primary Classification. Under the heading of "Primary Classification" there is no mention made of inverting the primary classification (as described under the Henry system), because it is an unnecessary loss of time to record the primary 32 5 classification as-s-, and then invert it, so as to appear as o?,; this useless inversion was in reality never practised by finger print experts, except perhaps in England, and even there it has been dispensed with. This inversion was caused in writing the formula of a print, by expressing the first of each pair as the numerator and the second of each pair as the denominator, in the following manner, W I W I W I W I W,.,,,,,----j----i „T i--z--j-----, to comply with the use of the key L I L I W L I L J previously explained, and giving the following result: 1st pair WL, 2nd pair WL, 3rd pair WW, 4th pair WL and 5th pair WL, thus placing the impression (by applying the key) in the fifth vertical file and thirty-second horizontal file. In Fig. 466 the heavy black lines show the sections controlled by each pair and demonstrate how the key was applied. Instead of reversing the mode of expressing these pairs when the numerical value...

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