dowsing
Forum GOD!
I'd be interested to see how they replicate some of these smells. We could have some old book scented soaps
http://www.atlasobscura.com/articles/meet-the-woman-who-is-preserving-the-smell-of-history
http://www.atlasobscura.com/articles/meet-the-woman-who-is-preserving-the-smell-of-history