New to the hobby and have been trying to learn my machine. I have made five trips to a still inhabited late 1800's farm house where i grew up and have found around a hundred coins. They are coming from various depths from 2 to 10 inches. One 1925 wheat and a 1944P nickel. Every other coin has been 1965 or newer. Don't get me wrong, I'm well pleased with my results but am curious as to why there are no older coins popping up?I have dug a few tokens and other relics dating to the 20's and 30's but no old coinage. Am I doing something wrong?