Of all the phenomena of the physical world, none is more important than that of waves. The average individual naturally assumes that the only waves of any importance in nature are water waves. To the student of science, however, there are other waves in nature far more important than those which we see rolling over the surface of a lake or of the ocean.
©1932 by Iowa State Teachers College
Science Bulletin: Vol. 4:
7, Article 7.
Available at: https://scholarworks.uni.edu/science_bulletin/vol4/iss7/7