The collection of art songs, unified
by poet, narrative, musical style, or composer are called song cycle or program
music for instrumental music associated with story, poem, idea, or scene. First
song cycle was “Il Canzoniere” or “Rime Sparse” written by Italian humanist
poet Francesco Petrarca to his belove Laura.
Red-green color blindness can be broken down into two main types: Protan-type (“pro-tan”), which is a disorder of the first “prot-” type of retinal cones also called the L-cones, and Deutan-type (“do-tan”) which is a disorder of the second type of retinal cone also called the M-cones.
