抄録
The wave length of the surface wave can be culculated from its period. The periods of the surface waves on the Totominada were observed from August to October in 1934. The maximum values of the wave length and the period of Muroto typhoon were 600 meters and 19 seconds respectively. When Totominada was set in the umbra of the surface waves produced by Kii peninsula, both the wave length and the period on Totominada suddenly fell. As the result of observation, the wave length of the surface waves produced by the typhoon in October proved to diminish by 62 meters, compared with the value of the wave length of the furface waves when that typhoon was in rest. This is the Doppler's effect.
