Importance

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Abstract

In a method for tagging members of a large homogenous group of macro-organisms so that each macro-organism is assigned to a respective one of a plurality of statistically equivalent subgroups, successive segments of wire are cut from a continuous length of wire indelibly marked along the length thereof with a plurality of identification codes at least equal in number to the members of the large homogenous group to be tagged. Each identification code includes a plurality of longitudinally extending multidigit binary words and a circumferentially extending multidigit binary word. The circumferentially extending binary word in any identification code has one of a plurality of different values, each of the values occurring in a number of the identification codes substantially equal to the total number of macro-organisms divided by the number of the subgroups. The different values of the subgroup identification word follow one another along the length of the wire in a pre-established repeating sequence or randomly.

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