1889 The Lancet  
published the results of some researches that he has made upon the nasal vowels of the French and other languages. He made use of the tonometer of Kaenig; he also employed another method, -consisting in pronouncing the vowels, and then, without altering the position of the vocal organs, bringing near to the mouth a number of tuning forks in a state of vibration until he discovered the one whose sound was increased by the presence of the air contained in the buccal cavities. The French nasal
more » ... ls on, an, es were found to have for their corresponding notes the minor thirds below the notes corresponding to the simple vowels o, a, e. The non-French nasal groups o7zc, ang, ei?"q are a Seznitone less than the octave below. This rule does not apparently hold good for diphthongs such as 6M, eicza, 6M/y. As Dr. Loewenberg is
doi:10.1016/s0140-6736(01)91097-9 fatcat:4yezbamhmvecfmsqtbtshrwmom