**PLATE XXX**.

The curved lines enclose the three chords of the major mode of the scale, with the ratio-numbers for the vibration in their simplest expression, counted, in the usual way in this work, from F1, the root of the major subdominant. The chords stand in their genetic position of F F C A, that is F1 by 2, 3, and 5; and so with the other two. The proportions for a set of ten pendulums are then placed in file with the ten notes from 1 to 1/2025 part of 1. Of course the *one* may be any length to begin with, but the proportions rule the scale after that. [Scientific Basis and Build of Music, page 121]

See Also

**cosmic pendulum**
**double compound pendulum**
**Figure 2.7 - Swinging Pendulum showing equal but opposed Polar States**
**Figure 8.9 - Four Fundamental Motions of a Pendulum**
**Harmonograph**
**Pendulograph**
**pendulum**
**Ramsay - Pendulum Illustrations of Ratios**
**Ramsay - PLATE XXVIII - The Two Modes Notes Pendulums**
**Ramsay - PLATE XXX - Vibration Ratios and Pendulum Proportions**
**Ramsay - The New Way of Reckoning a Pendulum Oscillation**
**Ramsay - The Sharp and the Flat - Pendulum Illustration of Ratios**
**Sympathetic Oscillation**
**system of motions in pendulums**
**Distance**
**first condition in the first ratio**
**first condition of the second ratio**
**Motion**
**Number**
**Period**
**Ratio**
**theory of relativity**
**Time**