Albinism in humans all vertebrates, including humans. It is due to absence or defect of tyrosinase, a copper-containing enzyme involved in the production of melanin. It is the opposite of melanism. Unlike humans, other animals have multiple pigments and for these, albinism is considered to be a hereditary condition characterised by the absence of melanin in particular, in the eyes, skin, hair, scales, feathers or cuticle. While an organism with complete absence of melanin is called an albino, an organism with only a diminished amount of melanin is described as leucistic or albinoid. The term is from the Latin "albus", "white". There are
What Is Art? Aylmer Maude, translator of many of Tolstoy's writings, calls it "probably the most masterly of all Tolstoy's works", citing the difficulty of the subject matter and its clarity. For a comprehensive review of the reception at the time of publication, see Maude 1901"b". Bayley, John (1986 [1966]). ""What is Art?" - excerpt from Tolstoy and the Novel" in Bloom, Harold (ed.). Leo Tolstoy. New York: Chelsea House. p. 141-152. Jahn, Gary R. (1975). "The aesthetic theory of Leo Tolstoy's "What is Art?"". "Journal of Aesthetics and Art Criticism" 34 (1): 59-65. Maude, Aylmer (1901a). “"What is Art?" - An Introduction”,