Early Chinese scientists began to make observations of certain factors within their environment which they noted had profound effects on those who lived and worked there. For example, they found that there were certain locations that when eggs were buried in the ground they were preserved for several months while a different location allowed the eggs to rot. They concluded that if these places were good for preserving such things as eggs, how much more so for life if they were to build their houses there. (In the first instance it appears that these locations were sought out as ideal grave sites.) They noted that a single object such as a tree or a rock or a post placed within an immediate direct line of a main used door caused problems for those living and working within the structure. They found that people sleeping, sitting or working under exposed ceiling…