Protimalethes, II, [6].

Ptolemy, I, 5, 33, 380.

Pullicino, II, [61], [61].

Pusey, I, 64.

Pyramids, The, I, 328; II, [95], [136].

Pythagoras, II, [59].

Quadrature problem. (See Squaring the circle.)

Quarles, F., II, [277].

Quintilian, II, [280].

Quotem, C., I, 399.