According to the Wikipedia entry I’ve just edited,

Number Nine, often referred to simply as “#9,” is the ninth studio album by the English rock band the Beatles, released in November 1968. A double album, its plain white sleeve has no graphics or text other than the album’s name embossed, which was intended as a direct contrast to the vivid cover artwork of the band’s previous LP, Sgt. Pepper’s Lonely Hearts Club Band.

Side 1 of Number Nine consists, appropriately enough, of nine tracks:

Revolution 0: This brief prologue repeats the album’s title several times, in case anyone was confused.

Revolution 1: The Beatles had a high degree of confidence, bordering on arrogance, in their ability to go wherever they wanted and bring an audience along. And so even after a lengthy year and a half between albums, they did not fear to lead off Number Nine with the noisy, 11-minute-plus “Revolution 1,” which tried the patience of even the most loyal Beatles fans. But as a reward they were then treated to….

Back in the U.S.S.R.: It’s amazing that this lighthearted romp, so clearly sung with tongue firmly in cheek, was taken as a serious endorsement of communism by the likes of the John Birch Society. Lighten up, people.

Dear Prudence: Here the album takes a sudden left turn into folkie territory. We all know, don’t we, the story of how this song was written to coax reclusive Prudence Farrow out into the world? Imagine having a song this good written for you. It rather boggles the mind.

Blackbird: Supposedly Paul’s paean to the American civil right movement, and especially to the women thereof. Maybe so; or maybe Paul just liked birds.

Child of Nature: It’s hard to believe that this beloved chestnut almost didn’t make the album. It had been neglected throughout the album sessions, and only at the last minute did John remember that he’d recorded it at George’s house back in May. Though “Child of Nature” is clearly of lesser sound quality than the songs recorded at Abbey Road and/or Trident, somehow it sounds just right.

Mother Nature’s Son: Inspired by the same Maharishi Mahesh Yogi lecture as “Child of Nature,” “Mother Nature’s Son” has both similarities and differences, giving us a chance to see how John and Paul treat the same subject matter. It is also influenced by the Nat King Cole classic “Nature Boy.”

Long, Long. Long: It has indeed been a long, long, long time since this thing began. It took some effort to convince EMI engineers to make the technical adjustments necessary for an LP side to be 29 minutes long; but in the end, as always, The Beatles got what they wanted.

Revolution 2: And that’s a wrap.