Text: The Law of Variation of Atomic Pitch by Temperature "Atoms in chemical combination oscillate with increasing amplitude directly as the temperature, and simultaneously absord overtones of higher harmonics, producing expansion of volume and diminution of pitch. Rule: The gradual approach of the temperature of harmonic combination can be observed by mutually comparing superimposed spectra; chemical combination commences when the fundamental lines of each spectrum bear harmonic ratios by linear measurement." (Keely)

See Also:

Source: