Hydraulics, science, of iii. [38];

as a fine art, i. 281, 282.

Hypothesis, correct, ii. 309;

effect of, on mind, ii. 432.

I. See [Ego].

Idea (Vorstellung), what it is, ii. 400;

common form of all classes of, i. 3;

form of combination of all classes of, i. 5;

chief distinction among, i. 7;