One of the most underestimated problems to grasp is the difference between a longitudinal and transverse wave. In essence for transverse waves the displacement of the medium occurs perpendicular to the direction of propagation. We may see transverse waves on a string when it is pulled, on the surface of the water or any other liquid, throughout a solid, … In longitudinal waves the displacement is parallel to the propagation. Sound waves are an example of longitudinal pressure waves but also water that is running through a tube. Watch the next youtube and especially the first 6 minutes where Eric Dollard and Thomas Brown explain the difference between the two waves very well. The question is, how do those two waves manifest themselves in ‘the wave’ of Walter Russell… To be continued….