ABSTRACT
We have been considering for the past two chapters the spin glasses and their entourage of cognate phenomena. After having spent so much time and energy introducing the encompassing physics and basic principles of the spin glasses in a rudimentary and qualitative way, we now should turn to experiment in order to find out exactly how it supports and confirms these notions, i.e., our physical picture, of a spin glass. Accordingly, measurements on real systems and their proper interpretation are the windows through which we gain our knowledge. Let experiment be our guide - after all it did come first.
