  We consider the vibrations and waves in the atmosphere under the gravitation
on the flat earth. The stratified density distribution of the back ground
equilibrium is supposed to touch the vacuum at the finite height of the
stratosphere. We show that incompressible motions are possible to create
vibrations or progressive waves with countably many time frequencies of the
vibrations or speeds of the wave propagation which accumulate to 0, say, of
countably infinitely many slow and slow modes.
