Experimental petrology it is possible to examine the behavior of a magma body as it slowly cools and crystallizes over time Experimental petrology Experimental petrology is the field of research concerned with experimentally determining the physical and chemical behaviour of rocks and their constituents. Because there is no way to directly observe or measure deep earth processes, geochemists rely on experimental petrology to establish quantitative values and relationships in order to construct models of the deep earth. Experimental petrology can range from creating artificial magmas to measure crystallization behavior to observing recrystallization of minerals at varying P/T (Pressure/Temperature) conditions. Although methodology varies
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”,