"First octave (unity of sound) is approximately the lowest frequency capable of producing waves of rarefaction and condensation in the air. The atomic aggregate oscillating at this pitch can be experimentally determined, and the aggregate vibrating at a pitch one octave higher will have a mass lying between 1/8 and the cube root of the mass of the first mentioned aggregate; the exact relation under varying conditions of gravity, magnetic saturation, and pressure, can be determined only by accurate measurements." [Scale of the Forces in Octaves]

See Also

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1st octave
3rd octave
4th octave
5th octave
6th octave
7th octave
8th octave
9th octave
C 1st Octave
D 2nd Octave
Figure 12.11 - Russells Locked Potential Full Ten Octave Gamut
Figure 9.17 - Russells Ten Octaves of Matter as Integrated Light - The Universal Constant
First Four Octaves - page 89
nine octaves of tones
Octave