Hourglass was James Taylor's first album in the soul genre.
 Albums of recorded sound were developed in the early 20th century as individual 78 rpm records collected in a bound book resembling a photograph album; this format evolved after 1948 into single vinyl long-playing (LP) records played at 33+13 rpm
== Types of album ==The contents of the album are usually recorded in a studio or live in concert, though may be recorded in other locations, such as at home (as with JJ Cale's Okie, Beck's Odelay, David Gray's White Ladder, and others), in the field  as with early Blues recordings, in prison, or with a mobile recording unit such as the Rolling Stones Mobile Studio

