Thanks, Denny and Kevin. I've been keeping a towel, saturated with water, wrapped around the primary with a small box fan blowing on it. I've added water to the towel about three times a day to keep it wet and the temp has dropped to between 67 and 70. That's still not where I'd like it to be. Since I only have a crawlspace to store my beer in during fermentation, I'm guessing that I'll need to confine my brewing to three seasons out of the year--i.e., not in the summer.