Helmholtz or Kelvin Cloud Waves.


IT is of some historical interest to notice that the habitual use of the phrase ‘Helmholtz Waves’ to describe parallel rolls of cloud produced in the transverse direction by a wind in an upper region blowing over stationary air below is only partly justified; and many students of hydrodynamics are unaware of Kelvin's work in this connexion. It is true that… (More)
DOI: 10.1038/129205c0


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