as determining the tendency of life, iii. [149].

Sex, degree of, iii. [356].

Sextus Empiricus, i. 62, 93, 343, ii. 127.

Sexual impulse, difference between man and brute with reference to, i. 171, iii. [309];

significance and power of, i. 423, 425, 310, 312-314, 376;

physiological correlative of, iii. [314];

its relation to happiness of life, iii. [376];

voluntary renunciation of satisfaction of, i. 430, iii. [376].

Shaftesbury, iii. [397].

Shakers, iii. [449].