_A Scale of Vowel Sounds._--Can any correspondent tell me if such scale has
anywhere been agreed on for scientific purposes? Researches into the
philosophy of philology are rendered excessively complex by the want of
such a scale, every different inquirer adopting a peculiar notation, which
is a study in itself, and which, after all, is unsatisfactory. I should
feel obliged by any reference to what has been done in this matter.