He was able to show that the fingerprint pattern remained constant as the person grew older, and he devised characteristics of the fingerprints which could be used as unique identifiers of the person based on grouping the patterns into arches, loops, and whorls.
Siya ay upang ipakita na ang tatak ng daliri pattern naiiwan ang patuloy na lumago ang mga taong mas matanda pa, at siya devised katangian ng fingerprint na kung saan ay maaaring gamitin bilang natatanging identifier ng tao batay sa pagpangkat ang mga pattern sa arko, loops, at whorls.