Machinery and processes of the industrial arts, and apparatus of the exact sciences (1869)
Barnard, Frederick A. P. (Frederick Augustus Porter), 1809-1889 · Washington, Govt. print. off. · leaf 494
e bass. The C, as thetonic note of the natural scale, takes its place at the top of the circle.The other letters follow in their order. But while the system of equaltemperament is shown by the twelve visible grades, the proper places ofthe notes of the chromatic scales are shown on the circular… … tillmans tonometer dial. 477 by a spearhead, which point to the several notes of the natural diatonicscale as determined by equal temperament, when the leading arm isbrought opposite to the origin at C. If the same leading arm is broughtopposite to any other letter or escutcheon, the remaining arms…
Machinery · Scientific apparatus and instruments
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