The base of the model is a plain board 26 by 9 inches. At the rear edge of this is another board 5 inches wide, set on edge, A, Fig. 1. To the upper edge of the latter are hinged 27 metal rods A D, 8 inches long. The front ends of the rods are free to move up and down in vertical slots C, and each carries a white disc D half an inch in diameter, which is soldered at its center to the end of the rod, and at right angles with it. Approximately simple harmonic motion is imparted to these discs, so that they represent the vibrations of the particles of an elastic medium transmitting a simple transverse wave motion.
Proceedings of the Iowa Academy of Sciences
©1901 Iowa Academy of Science, Inc.
Veblen, A. A.
"Some Improved Laboratory Devices and Apparatus,"
Proceedings of the Iowa Academy of Science, 9(1), 34-43.
Available at: https://scholarworks.uni.edu/pias/vol9/iss1/6