Any Mead brewers in the house?

[Bing]

Without a thermometer heat your water until you have a layer of bubbles all over the bottom of the kettle. Within 1,000 feet of sea level you should be right at 155°F. Turn off the stove, pour the honey into the water, stir to dissolve, cover the kettle and check your thermometer 40 minutes later to make sure the liquid is at or above 140°F.

I use a sanitized plastic Coleman chest cooler similar to my infusion mash setup to hold a (relatively) steady temperature for a long period of time.