noun: mutual exchange of commercial or other privileges
noun: a relation of mutual dependence or action or influence
Schauberger
When the Earth approaches the Sun in winter the intensity of light increases, because in this case the resisting power of the Earth's almost hermetically sealed pores (nozzles) becomes greater. If this natural reciprocity is copied naturalesquely, then the production of power, light, heat and cold will be virtually free. On the other hand, germinating- and growth-energies will continuously and progressively rise to about an average of 30% per annum, which roughly corresponds to the normal increase in the human population. [The Energy Evolution - Harnessing Free Energy from Nature, Bio-Technology: Active and Reactive Temperatures]
See Also
7.2 - Rhythmic Balanced Interchange
13.14 - Principle of Reciprocity
Rhythmic Balanced Interchange
seesaw