what is this proposal?
He proposed that any practical electrical unit could be chosen as the new fundamental unit, independent from the meter, kilogram, and second.
Kilogram
 Any practical electrical unit could be chosen as the new fundamental unit, independent from the meter, kilogram, and second. 
which unit is used to measure mass in the metric system kilogram what does this system refers to? It is a system of measurement that succeeded the decimalised system. when was this concept launched? 1790 can you mention one of its principles? Designed for transnational use, it consisted of a basic set of units of measurement, now known as base units. can you name any two of such base units? "metre" for length, "kilogram" for mass, "second" for time, etc. what is meant by the common version of this system? A number of different metric system have been developed, all using the "Mètre des Archives" and "Kilogramme des Archives" (or their descendants) as their base units, but differing in the definitions of the various derived units. from where does the mass base unit derived its name? UNANSWERABLE which proposal is related to this unit? The Giorgi proposal
wiki:7764050
Kilogram [SEP] The Giorgi proposal
But Giorgi pointed out that the volt and the rest could be "made" coherent if one gave up on the idea that all physical quantities must be expressible in terms of dimensions of length, mass, and time, and admitted a "fourth base dimension" for electric quantities. Any practical electrical unit could be chosen as the new fundamental unit, independent from the meter, kilogram, and second. Likely candidates for the fourth independed unit included the coulomb, the ampere, the volt, and the ohm, but eventually the ampere proved to be the most convenient as far as metrology. Moreover, the freedom gained by making an electric unit independent from the mechanical units could be used to rationalize Maxwell's equations.