As regards the "Horn Angle" I take this opportunity to bring into your
attention two articles written by me - a long time ago:
P.M.J.E. Tummers, Geometry and Theology in the XIIIth century, in: Vivarium
18, 1980, p. 131-142
and
P.M.J.E. Tummers, Albertus' view on the angle, with special emphasis on his
Geometry and Metaphysics, in: Vivarium, 22, 1984, p. 35-62.
Paul Tummers.
Dr P.M.J.E. Tummers
Faculty of Philosophy
Erasmusplein 1 k 15.14
P.O. Box 9103
6500 HD Nijmegen
Netherlands
tel.(0)24.3612945 (work)
(0)26.4453731 (home)
e-mail PTummers@Phil.Kun.Nl