Manichæans, iii. [305].

Mannerists, i. 304, 305.

Manzoni, ii. 352.

Marcionists, iii. [305], [438], [442], [443].

Marcus Aurelius, ii. 356, iii. [323].

Marriage, iii. [333], [334], [336-375].

Materialism, i. 34 seq., ii. 175 seq., iii. [60-64], [261], [262].

Mathematics, scientific nature of, i. 81, 82;

ground of certainty of, i. 157, ii. 268;

and genius, i. 246, 247;