In addition, rice productivity also increased by around 0.26 quintal / hectare or around 0.71%. Modern quartal and quintal harmony revives the polyphonic traditions of medieval Europe. Other types of harmony consist of quartal and quintal harmony. This would later influence the development of quartal and quintal harmony. Chords can also be built by stacking fifths, yielding quintal harmonies. Quartal and quintal harmonies also appear in alternate tunings. The other three surviving mutineers were Matthew Quintal, William McCoy and John Adams. First Officer Quintal was also experienced, having logged over 7,000 hours of total flight time. Fifths are stacked to form chords in quintal harmony. He left behind his wife Gloria Hyacinth Quintal and four children. First Officer Quintal died at age 68 on September 24, 2015, in Saint-Donat, Quebec. Conversely, there were 100 "livres" in a "quintal" (c.f. English hundredweight). He, Quintal, and some of the women were continually drunk. The personal collection of Dr. Quintal formed the early nucleus of the holdings. They gained much more respect than McCoy and Quintal, who became alcoholics.