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Now the aphelial movement of Saturn at its slowest—i.e., the slowest movement—marks G, the lowest pitch in the system with the number 1´46. Therefore the aphelial movement of the Earth will mark the same pitch, but five octaves higher, because its number is 1´47, and who wants to quarrel about one second in the aphelial movement of Saturn? But let us take it into account, nevertheless; the difference will not be greater than 106 : 107, which is less than a comma. If you add 27, one quarter of this 1´47, the sum will be 2´14, although the perihelial movement of Saturn has 2´15; similarly the aphelial movement of Jupiter, but one octave higher. Accordingly, these two movements mark the note B, or else are very slightly higher. Take 36, one third of 1´47, and add it to the whole; you will get as a sum 2´23 for the note C; and here's the perihelion of Mars of the same magnitude but four octaves higher. To this same 1´47 add also 54, half of it, and the sum will be 2´41 for the note D; and here the perihelion of Jupiter is at hand, but one octave higher, for it occupies the nearest number, viz., 2´45. If you add two thirds, viz., 1´11, the sum will be 2´58; and here's the aphelion of Venus at 2´58. Accordingly, it will mark the pitch or the note E, but five octaves higher. And the perihelial movement of Mercury, which is 3´0, does not exceed it by much but is seven octaves higher. Finally, divide the double of 1´47, viz., 3´34, into nine parts and subtract one part of 24 from the whole; 3´10 will be left for the note F, which the 3´17 of the aphelial movement of Mars marks approximately but three octaves higher; and this number is slightly greater than the just number and approaches the note F . For if one sixteenth of 3´34, viz., 13½, is subtracted from 3´34, then 3´20½ is left, to which 3´17 is very near. And indeed in music f sharp is often employed in place of F, as we can see everywhere
