A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams (1829)
Curtis, Thomas, fl. 1820 · London : Thomas Tegg · leaf 328
3e^ :a --v » n ») -^\l—— qi?o _o.. ^=^11 -^-■1 The harmony of the augmented fifth, with theminor seventh, produces only one inversion, thus : … the second, on account of the forbidden intervalof the diminished third, being nowise practi-cable. The harmony of the augmented sixth, majorthird, and perfect fiftli, the eleventh of the clas-sification, is employed in the formation of perfectcadences, but always upon the sixtli degree ofthe…
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