Changing money, one accidentally gets some coins with holes through them. In sending a message to the telegraph office, they told me I had sent a coin with a hole through it, and I had to take it back. The suggestion occurred to me was the coin depreciated. I have experimented with copper. Any one who knows the nature of that metal knows that we can put a hole through it without diminishing the weight. If you punch a hole through a copper coin without reducing the weight, I cannot understand how you reduce the value.