Program music 1970s in particular experimented with program music, among which was Rush's "Jacob's Ladder" (1980), which shows clear influences of Smetana's "Má vlast" ("My Homeland") (1874-1879). In addition, Rush's songs "Xanadu", "Red Barchetta", and "YYZ" also show their experimentalism with program music, as do parts of "2112", particularly the discovery scene. Composers and some theorists argue that there is indeed no such thing as true "absolute ("ars gratia artis") music" and that music always at least conveys or evokes emotions. While non-professional listeners often claim that music has meaning (to them), "new" musicologists, such as Susan McClary (1999), argue that so-called
Ars grammatica book contains one of the most complete lists of types of dactylic hexameters in antiquity, including the "teres versus", which may be the so-called golden line. The "Ars" of Diomedes still exists in a complete form (although probably abridged). It was first published in a collection of Latin Grammarians printed at Venice by Nicolas Jenson in about 1476. The best edition of Diomedes's "Ars Grammatica" is in "Grammatici Latini" vol. I by Heinrich Keil. Ars grammatica An ars grammatica () is a generic or proper title for surveys of Latin grammar. Extant works known as "Ars grammatica" have been written