Experiments below will not be sorted purely chronologically and will not be listed according to streams of consciousness either. They will rather be explained in a logical way which builds coherently towards the inference of conclusions and the way in which experiments aided the understanding which was so necessary. A brief and incomplete list of milestones was included in the earlier part of this chapter and although this list is not expected to be complete in any sense, it should be able to cover much of the more important experiments in sufficient detail for them to be truly understood.