TO: internet:harp-l@xxxxxxxxxxxxxx Jim C asks about the 4th degree in blues scales. Yes, both the C and G blues scale include a perfect 4th: 1 m3 4 b5 5 m7 G G Bb C Db D F C C Eb F Gb G Bb I may have inadverdently omitted one of them. Sorry for any confusion this may have caused Winslow Yerxa Harmonica Information Press Z Z