Schauberger
[1] In the conversion of carbonic acid (H2CO3) to carbon dioxide or carbonic acid gas (CO2) with heat, molecular hydrogen (H2) is released. Therefore a kind of vacuity is created, causing a reduction in the inner 'volume'. — Ed.
[12] See descriptions of Patent Nos. 134543 and 138296 (pp. 201-203) and associated figures Nos. 8 and 9, p. 63 in The Water Wizard, Vol. I of the Ecotechnology series. - Ed. [The Energy Evolution - Harnessing Free Energy from Nature, The Liquefaction of Coal by Means of Cold Flows]