John C. Van Dyke 
How to Judge of a Picture [PDF ebook] 
Familiar Talks in the Gallery With Uncriticial Lovers of Art

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. It may be that these pages will be a hint or a suggestion to those better able to handle the theme than I am; and surely in a country like America, where so little is known of art among the masses, there should be a place for such literature as this.