Vibration theory of olfaction have a vibrational energy mode compatible with the difference in energies between two energy levels on the receptor, so electrons can travel through the molecule via inelastic electron tunneling, triggering the signal transduction pathway. The vibration theory is discussed in a popular but controversial book by Chandler Burr. The odor character is encoded in the ratio of activities of receptors tuned to different vibration frequencies, in the same way that color is encoded in the ratio of activities of cone cell receptors tuned to different frequencies of light. An important difference, though, is that the odorant has to be able
Oh, What Songs of the Heart blest, There's no word, there's no thought can impart, But our rapture will be All the soul can attest, In the heavenly songs of the heart; But our rapture will be In the vision we'll see Best expressed in the songs of the heart Oh, what songs we'll employ! Oh, what welcome we'll hear! When we kneel at our dear Savior's feet. And the heart swells with joy In embraces most dear When our heavenly parents we meet! Oh, what songs we'll employ As the heart swells with joy, When our heavenly parents we meet! </poem> "Oh, What Songs of