Third

Third or 3rd may refer to:

Numbers

Music

Music theory

Minute and second of arc

A minute of arc (MOA), arcminute (arcmin) or minute arc is a unit of angular measurement equal to one-sixtieth (1/60) of one degree. As one degree is 1/360 of a circle, one minute of arc is 1/21600 of a circle (or, in radians, π/10800). It is used in fields that involve very small angles, such as astronomy, optometry, ophthalmology, optics, navigation, land surveying and marksmanship.

The number of square arcminutes in a complete sphere is approximately 148,510,660 square arcminutes.

A second of arc (arcsecond, arcsec) is 1/60 of an arcminute, 1/3,600 of a degree, 1/1,296,000 of a circle, and π/648,000 (about 1/206,265) of a radian. This is approximately the angle subtended by a U.S. dime coin (18mm) at a distance of 4 kilometres (about 2.5 mi).

To express even smaller angles, standard SI prefixes can be employed; the milliarcsecond (mas), for instance, is commonly used in astronomy.

Symbols and abbreviations

The standard symbol for marking the arcminute is the prime (′) (U+2032), though a single quote (') (U+0027) is commonly used where only ASCII characters are permitted. One arcminute is thus written 1′. It is also abbreviated as arcmin or amin or, less commonly, the prime with a circumflex over it ().

Thirds (album)

Thirds is the third studio album by the American rock band, James Gang. The album was released in mid 1971, on the label ABC Records. It is the last studio album featuring Joe Walsh. "Walk Away" was released as a single, making the Top 40 on at least one national chart, reaching #51 on the Billboard Hot 100, the best placement of a James Gang single. The album reached Gold status in July 1972.

On the liner notes to the LP version of this 1971 album, Joe Walsh is credited with "guitar, vocals, and train wreck", the latter for his work on the song "Walk Away". The third element was a wry commentary on the multi-tracked, cascading lead guitars that clash as the song fades out.

The Walsh period of the band came to a close with the release of the live album James Gang Live in Concert.

Critical Reception

Writing for AllMusic, critic William Ruhlman wrote the album "though Thirds quickly earned a respectable chart position and eventually went gold, it was not the commercial breakthrough that might have been expected."