The diatomic scale consisting of a succession of eight tones and containing three intervals known as ''major second intervals,” two known as ''minor second intervals'' and two "half-tones," is not adapted to musical instruments of "fixed pitch'' (e.g. the piano, harp, etc.) for the reason that it does not without a multiplicity of keys (strings) allow of transposition or change of keys.
Proceedings of the Iowa Academy of Science
©1915 Iowa Academy of Science, Inc.
Spinney, L. B.
"A Simple Device for Demonstrating the Tempered Scale,"
Proceedings of the Iowa Academy of Science, 22(1), 327-328.
Available at: https://scholarworks.uni.edu/pias/vol22/iss1/45