Quadrivial Pursuits Media Outlet
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[Deposited 11/2011, but copyright date is 2012.]
Chapter 1: Introduction and Pre-Quadrivium
Chapter 2: Introduction and Overview of the Quadrivium via Boethius, Martianus, Macrobius, et al.
Monochord demonstrations for web only: Here is an approximation: Link.
Chapter 3: Oresme
At present, whenever you click on an animation it takes you to a separate page.
To get back to this page, simply use the "back" button on your browser.
Animation 3.1: Conjunction and Revolution – 5:3 Ratio of Rotational Speeds. This animation shows how a 5:3 ratio of motions will return to the initial conjunction. Oresme's writes, "When A will have made 5 circulations, B will have made 3, and they will be where they are now."
Animation 3.2: 15 Day Revolution. Conjunction at 7.5 days is indicated.
Animation 3.3: Conjunction Every 7 and 1/2 Days
Animation 3.4: Two Conjunctions for 5:3 Motions
Animation 3.5: Proximate Conjunction [the same as Anim. 3.2]
Animation 3.6: Spatial and Temporal Distribution of Conjunctions for 12:5 Ratio of Motions.
Animation 3.7: Conjunctions for a 2:1 Ratio of Orbital Speeds.
Animation 3.8: The Infinite Variety Demonstrated by Two Bodies Moving with Incommensurable Motions
Chapter 4: Prosdocimo
Chapter 5: Alberti
Chapter 6: Conclusions
Appendix 4: Prosdocimo materials
Appendix 5: Alberti materials
The Stranger Side of Quadrivial Pursuits
Look about 3/5 down this site for the description of the Monochord Table.
This 55-stringed "monochord" is astronomically tuned ["tuned according to the season of the year"]. Lie down on this monochord table, relax, and get a tune-up. The sound file is is nifty.
If you prefer, you could have the monochord lie on you.
Contact me if you have any problems with these PDFs or have any questions at:
...or just reply to any of my previous emails.