Octave species various available intervals could be combined in any order, even restricting species to just the diatonic genus would result in twelve ways of dividing the octave (and his 17th-century editor, Marcus Meibom, pointed out that the actual number is 21), but "only seven species or forms are melodic and symphonic" . Those octave species that cannot be mapped onto the system are therefore rejected . In chant theory beginning in the 9th century, the "New Exposition" of the composite treatise called "Alia musica" developed an eightfold modal system from the seven diatonic octave species of ancient Greek theory, transmitted to
Octave Chanute Aerospace Museum a sign with a Legal Notice attached to it to ‘Stop Work.’ There were areas on the Notice that could have been filled out, such as the date and which violations were found, but nothing was there; it is not known how long the Notice was on the sign. Octave Chanute Aerospace Museum The Octave Chanute Aerospace Museum, the largest aviation museum in Illinois, occupied part of the grounds of the decommissioned Chanute Air Force Base in Rantoul, Illinois. It and the base were named for Octave Chanute, railroad engineer and aviation pioneer. The museum was dedicated to the life