The breath directed horizontally across the open end, impinged against the sharp inner edge of the pipes, creating the regular series of pulses which generate the sound waves within the tubes.
From beginning to end, scarcely a work of thought is mentioned as having seriously impinged on him.
The sustaining of the whole, therefore, depended upon the speed at which it travelled through the air, and the angle at which its under surface impinged on the air in its front....
Where an aluminous porphyroblast impinged on a quartz-rich pseudomorph, it did not replace the quartz.
As the supply of sodium was increased, the lines, besides becoming broader, did so unsymmetrically, and a shaded wing or band appeared on one side or the other according as the beam impinged on one side or the other of the flame.