I just heard about this thing called a heat index. There is supposed to be 110 index here in Memphis today. So I will be staying inside. Which of course means that I will be taking more naps. So it got me to thinking. Is there also a nap index? How is it measured? Minutes per day? Does it include sleeping or just napping? I think it should be both. So if there are 1440 minutes in a day that is probably the top number of the index. So on a normal day I would say my index is about 720. I wonder what my nap index will be when it is 110 heat index? 50% higher? I really need to start keeping track of this correlation. I could be on to something.