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In a previous paper formulae for the radio emission originating from the scattering of a plane plasma electron wave by thermal fluctuations were derived. These formulae are applied to the solar type III bursts by starting from a cloud of electrons which transverses the solar corona thereby exciting plasma waves. The electric field of the excited waves is estimated by an expression of the quasilinear theory. The band width of these waves is about 10% of the local plasma frequency. The scattering mechanism considered here can account only for the faint and moderate type III bursts without harmonic structure. The possibility to determine the thickness of the cloud in its variation with time is discussed.

Die solaren Bursts vom Typ III