Alexander John Ellis 
Pronunciation for Singers [PDF ebook] 
With Especial Reference to the English, German, Italian, and French Languages; With Numerous Examples and Exercises for the Use of Teachers and Advanced Students

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Glossic was specially invented by me for the purpose Of writing all English dialects by one alphabet, every sound which was required for this treatise had already been properly symbolised, and hence there was no Object in introducing any other set of signs.