One of the fun facts I learned from the Money Smart Week exhibit at the library is that dimes have 118 ridges or grooves and quarters have 119.  But what the exhibit didn't tell me was the reason for the ridges.  So what's a reference librarian to do? Find the answer, of course.  I started at the United States Mint which lead me to the American Numismatic Association. The first thing I learned was the technical term for the ridges or grooves on coins  is reeding.  Before the introduction of reeding, small amounts of gold or silver from coins could be chiseled or shaved away and the precious metal sold again or remelted and made into another coin. (The slang usage of the world chisel may even derive from this ancient practice.)  While quarters and dimes are no longer minted from silver, (with the exception of special collectable quarters), the ridges remain.

Come in a take a look at the exhibit - you will find it in the first floor gallery. You can explore the life cycle of currency, learn about the role of the Federal Reserve Bank and get your photo taken in $100 bill.  What else can you learn during Money Smart Week? Preschoolers will have a visit from Ben Franklin for the 10:30 preschool story time Thursday morning, April 10.   And if you want to know more about estate planning, the library has a program tailor made for you. Thursday evening, April 10, Thomas Gelman, attorney Phelan Tucker Muller Walker Tucker Gelman and John Chadima, Vice President and Trust Officer MidWestOne Bank offer Estate Planning 101: Basic Considerations.