Possible Redefinitions of the Kilogram

The limitations on the stability of the kilogram defined in terms of the international prototype could be eliminated if the kilogram were defined in terms of a 

An alternative statement of the definition of the meter could be The meter is the unit cf length scaled such that the velocity cf light is 299 792458 m/s. 

An analogous definition of the kilogram, based on a certain value of a fundamental constant, can be made by specifying the value of the Planck constant. Such a definition could be used to determine the mass of an object by means of the watt-balance experiment [3-5] which is sketched as follows. 

In this experiment, the volume and lattice spacing of a crystalline silicon sphere with a precisely known mass is measured to determine the number of atoms it 

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