Alexander H. McGuffey 
McGuffey’s Eclectic Spelling Book [PDF ebook] 

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. The Vowels are those letters which can be perfectly sounded without the aid of any other letter. The vowels are a, e, ‘i, 0, u, w, and y. The vowel sounds of w and y are the same as those of u and i. A and 0 are always vowels. E, i, u, u), and y are sometimes consonants.