Jay J, I sure hope you can help me. I went to school for three years to get a good job. To make a long story short. Of course I start on the bottom, which brings me to the point of this letter. I'm working my way up the ladder by self study. I am going into E&I. While studying, I vaguely remem- bered some sort of instrument which used red human hair as a component. When I started asking around, the guys had never heard of it. I knew that I had not imagined it. As far as I could recall... the instrument in question measured humidity. I found a little info. on another site, but I was wondering if you might know of a site on which I could get a good description of the design and function of this humidistat.... or hygrometer... not real sure which.