on the elevation of the pole at different latitudes, [213], [214].
on the Primum Mobile, and the diurnal movement of the stars, [216], [228], [234].
on the anomalies of the earth's motion, [237].
Puteanus, Gulielmus (Du Puys), [3], [63].
pyrimachus (i.e., pyrites), [23].
pyxis, [3], [115], [147], [165], [172].
Radius, the, of the earth's orbit, [218].
Rasis. See Rhazes.