Text: "Atoms in chemical combination oscillate with increasing amplitude directly as the temperature, and simultaneously absorb overtones of higher harmonics, producing expansion of volume and diminuition 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, pre1894)

See Also: LAW OF HEAT; LAW OF TRANSFORMATION OF FORCES; FRAUNHOFER; SPECTRA

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