Ideas defined, ii. 2. 7.
——­ are motions of the organs of sense, iii. 4. xviii. 5. xviii. 10.
xviii. 6.
——­ analogous to muscular motions, iii. 5.
——­ continue some time, xx. 6.
——­ new ones cannot be invented, iii. 6. 1.
——­ abstracted ones, iii. 6. 4.
——­ inconsistent trains of, xviii. 17.
——­ perish with the organ of sense, iii. 4. 4.
——­ painful from inflammation of the organ, iii. 5. 5.
——­ irritative ones, vii. 1. 4. vii. 3. 2. xv. 2. xx. 7.
——­ of resemblance, contiguity, causation, viii. 3. 2. x. 3. 3.
——­ resemble the figure and other properties of bodies, xiv. 2. 2.
——­ received in tribes, xv. 1.
——­ of the same sense easier combined, xv. 1. 1.
——­ of reflection, xv. 1. 6. ii. 2. 12. 
Ideal presence, xv. 1. 7. 
Identity, xv. 3. 5. xviii. 13. 
Iliac passion, xxv. 15. 
Imagination, viii. 1. 2. xv. 1. 7. xv. 2. 2.
——­ of the male forms the sex, xxxix. 6. 
Imitation, origin of, xii. 3. 3. xxxix. 5. xxii. 3. xvi. 7. 
Immaterial beings, xiv. 1. xiv. 2. 4. 
Impediment of speech, xvii. 1. 10. xvii. 2. 10. 
Infection.  See Contagion. 
Inflammation, xii. 2. 3. xxxiii. 2. 2.
——­ great vascular exertion in, xii. 2. 1.
——­ not from pains from defect of stimulus, xxxiii. 2. 3.
——­ of parts previously insensible, xii. 3. 7.
——­ often distant from its cause, xxiv. 2. 8.
——­ observes solar days, xxxii. 6.
——­ of the eye, xxxiii. 3. 1.
——­ of the bowels prevented by their continued action in sleep, xviii.
2. 
Inoculation with blood, xxxiii. 2. 10. 
Insane people, their great strength, xii. 2. 1. 
Insanity (see Madness) pleasurable one, xxxiv. 2. 6. 
Insects, their knowledge, xvi. 15. and 16.
——­ in the heads of calves, xxxix. 1.
——­ class of, xxxix. 4. 8. 
Instinctive actions defined, xvi. 1. 
Intestines, xxv. 3. 
Intoxication relieves pain, why, xxi. 3.
——­ from food after fatigue, xxi. 2.
——­ diseases from it, xxi. 10.
——­ See Drunkenness. 
Intuitive analogy, xvii. 3. 7. 
Invention, xv. 3. 3. 
Irritability increases during sleep, xviii. 15. 
Itching, xiv. 9.

J.

Jaundice from paralysis of the liver, xxx. 1. 2. ——­ cured by electricity, xxx. 1. 2.  Jaw-locked, xxxiv. 1. 5.  Judgment, xv. 3.

K.

Knowledge of various animals, xvi. 11.

L.

Lachrymal sack, xvi. 8. xxiv. 2. 2. and 7.  Lacteals, paralysis of, xxviii. ——­ See Absorbents.  Lady playing on the harpsichord, xvii. 2. ——­ distressed for her dying bird, xvii. 2. 10.  Language, natural, its origin, xvi. 7. & 8. ——­ of various passions described, xvi. 8. ——­ artificial, of various animals, xvi. 9. ——­ theory of, xxxix. 8. 3.  Lapping of puppies, xvi. 4.  Laughter explained, xxxiv. 1. 4. ——­ from tickling, xvii. 3. 5. xxxiv. 1. 4. ——­ from frivolous ideas, xxxiv. 1. 4. xviii. 12.  Life, long, art of producing, xxxvii.  Light