For music in any 7-shape system, where there are 7 different shapes of note-head. Several different systems were devised, the main competitors being: J.B. Aikin (1846), A. Auld (1847), W.H. Swan (1848), J. Funk (1851) and W. Walker (1866). The most successful of these, the Aikin system (invented by Jesse Bowman Aikin and introduced in his Christian Minstrel, 1846), is still used to this day - although his clef-less notation did not catch on. Of the others, only Funk's, Swan's and Walker's are in (limited) use today.
Most often the shapes correspond to the syllables Do Re Mi Fa So La Ti (or variations thereof), derived from the ancient Guidonian system, and familiar from the song in The Sound of Music (as well as being the same syllables used for Tonic Sol-Fa). However, The Norristown Musical Teacher (1830), designed as a bridge between 4-shape and 7-shape notation, includes options for several sets of alternative syllables.
This list is not complete, and will continue to grow as works are added to IMSLP. The list also includes some books that were published in or standard 'round' notation as well as in 7-shape (for example Funk's Harmonia Sacra).
See also Wikipedia article.
The following 55 pages are in this category, out of 55 total.