Schauberger
This pipe should be laid to a particular gradient and oriented in certain direction[13]. It should then be charged with water - the best kind being sea-water thoroughly irradiated by the Sun - to which coal dust, carbonic acid and other things have been added. [The Energy Evolution - Harnessing Free Energy from Nature, The Liquefaction of Coal by Means of Cold Flows]
See Also
coal
coal tar
The Liquefaction of Coal by Means of Cold Flows