Only those silver coins which were much worn by usage or in any other way defaced or reduced in weight remained in current use; it did not pay to export and to sell them on the bullion market.

The results showed that the discharge capacity of the MH electrode increased slightly when 3% silver was added, but the amount of the gas evolution from the simulated cell was obviously reduced.

When the concentration of silver ions is very low, silver ion can be reduced almost completely.