In a post dated May 3, 2014 on thread
http://www.tomatoville.com/showthread.php?t=31459 I marvelled about American inventiveness shown in the use of a light dimmer switch to stabilize the temperature of a heating mat.
Now I must say I’m absolutely flabbergasted. I hope Edison can see from above that his spirit is still flying high and the uses of his discoveries infinite.