| http://www.w3.org/ns/prov#value | - In carrying out my invention, as applied to a chain of this kind, I mark the smaller subdivisions or links by a studor rivet, a, Fig. l, of brass, copper, or other malleable metal, preferably, however, of some metal, having a difl'erent color frolnthe ribbon A. At each successive ten links I rivet a plate of brass, or otner metal, as at I) b, and stamp thereon the number of links it designates, as
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