Jean-Baptiste LACOSTE (Dijon 1725-1793). Essay on music and - Lot 499

Lot 499
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Jean-Baptiste LACOSTE (Dijon 1725-1793). Essay on music and - Lot 499
Jean-Baptiste LACOSTE (Dijon 1725-1793). Essay on music and Dissertation on music. 3 autograph manuscripts, one signed, from the second half of the 18th century. 50 pp. in-folio and in-4, erasures and corrections. These are three different versions, with strikethroughs, corrections and additions, of the same text devoted to harmonic studies in music: "One calls harmonic proportion that of which the large term is to the small term, as the excess of the large term over the medium term is to the excess of the medium term over the small term. 6.8.12 are in harmonic proportion because just as 12 contains twice 6, so 4 of which 12 exceeds 8 contains twice the 2 of which 8 exceeds 6 [] ". Rare 18th century manuscript of music theory, which seems to be unpublished.
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