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OCR Rendition - approximate
128 FINGER PRINTS CHAP. the two fore-fingers, and again in the two middle fingers, they are closely alike. Therefore, in these latter cases, it is not unreasonable to pass over the objection that X and Z have not been proved to be equal, but we must accept the results in all other cases with great caution. When the digits are of different names, as the thumb and the fore-finger,-whether the digits be on the same or on opposite hands, there are two cases to be worked out ; namely, such as (1) right thumb and left fore-finger, and (2) left thumb and right forefinger. Each accounts for 5 0 per cent of the observed cases ; therefore the mean of the two percentages is the correct percentage. The relationships calculated in the following table do not include arches, except in two instances mentioned in a subsequent paragraph, as the arches are elsewhere too rare to furnish useful results. It did not seem necessary to repeat the calculation for couplets of digits of different names, situated on opposite hands, as those that were calculated on closely the same data for similar couplets situated on the same hands, suffice for both. It is evident from the irregularity in the run of the figures that the units in the several entries cannot be more than vaguely approximate. They have, however, been retained, as being possibly better than nothing at all. [TABLE VIII.
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