Abstract
Lovz waves in a layer overlying a half-space are considered. Not only the signal but also free oscillations are excited by a source of a finite duration, resulting in a very complicated wave form. The present investigation is an attempt on the translation of the electromagnetic wave theory after BRILLOUIN (1964) into elastic waves dispersive. The other aim of it is to see theoretically the experimental results which were obtained by the author (1963, 1964). An outline of the wave group is easily understood by the similar treatment to that of BRILLOUIN'S.
