Seventh chord an augmented fifth, and an augmented seventh (i.e., a sequence of 3 major thirds, such as C–E–G–B), is a rarely used tertian seventh chord. The reason is that the augmented seventh interval is enharmonically equivalent to one entire octave (in equal temperament, 3 major thirds = 12 semitones = 1 octave) and is hence perfectly consonant with the chord root. The seven commonly used chords are: Seventh chords can also be constructed using augmented or diminished thirds. These chords are not tertian and can be used in non-tertian harmony. There are many (mathematically, 64) chords that can be built, however,
Octave Chanute Aerospace Museum a sign with a Legal Notice attached to it to ‘Stop Work.’ There were areas on the Notice that could have been filled out, such as the date and which violations were found, but nothing was there; it is not known how long the Notice was on the sign. Octave Chanute Aerospace Museum The Octave Chanute Aerospace Museum, the largest aviation museum in Illinois, occupied part of the grounds of the decommissioned Chanute Air Force Base in Rantoul, Illinois. It and the base were named for Octave Chanute, railroad engineer and aviation pioneer. The museum was dedicated to the life