Schauberger
[15] Linde process: (1) "A high pressure process for the production of liquid oxygen and nitrogen by compression to about 200 bar (20 MN/m2) followed by refrigeration and fractionation in a double column. - [Penguin Dictionary of Chemistry, Penguin Books, Great Britain, 1983, p.399.] [The Energy Evolution - Harnessing Free Energy from Nature, The Liquefaction of Coal by Means of Cold Flows]

See Also

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air column resonance
Fractionating Column and Distillates
Ramsay - PLATE XIII - The Vertebral Column of the Musical Scale
VERTEBRAL COLUMN