[7] This patent is not to be confused with French patent No. 1.057.576, which relates to the double-spiral pipe described under 'Processes and Equipment for the Conveyance of Liquid, Gaseous or Aeriform Media', p. 107 of this book. It may thus apply to another patent, perhaps for a Repulsator or Repulsine. On the other hand, since both numbers are virtually the same except for one digit, it may also be a typographical error. — Ed. [The Energy Evolution - Harnessing Free Energy from Nature, The Biological Vacuum - The Optimal Driving Force for Machines]