The Act of 1906 provided for the redemption of copper and nickel coins in lawful money, when presented in sums of not less than $20. When they are presented for redemption in such quantity as to indicate that they are redundant, the Treasury orders their coinage temporarily to be stopped. Numerous other coinage laws of minor importance have been enacted, but the above constitute the fundamental history of our coinage. Coinage is sometimes held to include the making of gold and silver bars.