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,
How to Have Sex in an Epidemic MSM in New York City and San Francisco had been infected. Retrospective analysis by the CDC found that there were between 250,000-300,000 people living with HIV in the United States in 1983, and the number of people newly infected between `83-`84 was around 150,000). However, the model set forth by Callen and Berkowitz at least provided the possibility of a "return to intimacy" for people with AIDS, which, despite being based on a now-defunct notion of how the syndrome arose, was important in combating the social death that many PWA faced after diagnosis. "How to Have Sex in an Epidemic"