• Illustrations shifted to the nearest paragraph break.
• Copyright notice is from the printed exemplar. (U.S. copyright was not renewed: this ebook is in the public domain.)

Following remarks have been marked in the text as well:

• Page 49, “socalled” changed to “so-called”
• Page 55, “Cosi fan Tutti” kept, but should be “Cosi fan Tutte”
• Page 56-58, “Saint-Saens” kept, but should be “Saint-SaËns” (3 times)