The simplest way to encourage use of the dollar coins is to retire the paper bills ("Spare change," Sept. 7).

My family has vacationed in Canada for 40 years, and during that time that country introduced the dollar coin (called a "Loonie" because of the imprint of a loon on its reverse side) and at the same time retired the bills. People soon stopped complaining, and soon the "Toonie" came along, and all two-dollar paper bills were retired.

We kept a little change purse for just these coins and found the whole situation no inconvenience at all. I say if the move will really save the U.S. a lot of money, it is something that should be done.

Alice Rohart, Baltimore