Alphabetical Index.

I. refers to the Logic; II., to the Mental Philosophy; 1, 2, 3, etc. to the paragraphs.

• Abstract, ideas, I. 11, 122 to 124, 148; II. 176, 182; number, 38.
• Accident, one of the predicables, I. 13; opposed to substance, II. 49, 50, 58, 59.
• Accidental cause, II. 77.
• Act, pure, II. 237.
• Action, II. 50, 55, 63 to 65, 78, 79, 85.
• Actual, being, II. 6, 12; division, 91.
• Adaptation of means to end, II. 150.
• Aevum, II. 70.
• Agnosticism, II. 103, 216, 217, 219, 234.
• Ambiguous middle, I. 57. II. 103, 216, 217, 219, 234.
• Analogy, I. 16, 50 to 52; II. 10.
• Analytic, judgments, I. 17, 63, 125 to 127; reasoning, 64 to 66.
• Anatomy, II. 157.
• Angels, I. 13 to 16; II. 139, 141 to 143; species fixed, II. 155.
• Anselm, St., II. 118.
• Answering objections, I. 55.
• Apparent conflict, of reason and Revelation, I. 3; of sciences, 68.
• Appetite, II. 191, 192, 195, 196.
• Appreciation, power of, II. 167.
• Apprehension, I. 9, 75 to 77.
• Argumentation, I. 22.
• Argumentum ad hominem, I. 54.
• Aristotle, II. 48, 101, 127.
• Atheists, II. 219, 225.
• Atomic theory, II. 131, 133.
• Attribute, I. 13; II. 36; of God, 239.
• Authority, I. 152 to 156.

• Beauty, II. 46, 47.
• Begging the question, I. 58.
• Being, II. 6; actual, possible, real, 7, 8, 12; logical, physical, 11; not a genus, 13; determination of, 14; possible, 17 to 27; necessary, 97.
• Belief, I. 153.
• Berkeley, I. 144.
• Boscowich, II. 130.
• Brute, animals, I. 148; for man, II. 138, 152; soul, 146 to 148.

• Categorical, propositions, I. 20; syllogisms, 23.
• Categories, II. 48.
• Causality, limits to, II. 85; principle of, 86 to 88.
• Cause, defined, II. 74; formally, materially, 76; material, formal, substantial, accidental, final, 77 to 79; efficient, 80; first, second, properly, accidentally, principal, instrumental, free, necessary, moral, physical, 83; contains effect formally, eminently, virtually, univocal, 84; has reality, 85.
• Certainty, I. 70, 71, 78, 112, 113; elements of, 84; philosophical, 85; species of, 86, 87; existence of, 89 to 99; criterion of, 165 to 170; sources of, 100 to 164.
• Change, II. 98, 99, 105.
• Chemistry, II. 128, 133.
• Circle, exercise of the, I. 69.
• Clear ideas, Descartes', I. 168.
• Cognition, II. 159; sensible, rational, 175, etc.
• Cognoscive powers, sketch of, I. 100 to 111.
• Common objects of sense-perception, I. 148.
• Common sense, I. 156 to 164; the, 103; consent, 159.
• Composition, II. 90; and division, I. 57.
• Comprehension of ideas, I. 16, 20, 25. II. 90; and division, I. 57.
• Conception, concept, I. 9.
• Conceptialists, I. 124; II. 184, 185.
• Conclusion, I. 24, 25, 29.
• Concrete, ideas, I. 11; number, II. 38.
• Concurrence with second causes, II. 264, 265.
• Condition, II. 82.
• Conditional knowledge, II. 250 to 253; propositions, I. 21; syllogisms, 35.
• Conjunctive, propositions, I. 21; syllogisms, 37. II. 250 to 253; propositions, I. 21; syllogisms, 35.
• Consciousness, I. 111, 114 to 118.
• Consequence, consequent, I. 29, 32.
• Constructing syllogisms, I. 24, 25.
• Contingent being, II. 96, 97, 220.
• Copula, I. 19.
• Cosmology, II. 4, 100.
• Creation, II. 106 to 108; purpose of, 113 to 115: of the soul, 211.
• Criterion, ultimate, of certainty, I. 165 to 170; of a true miracle, II. 124.
• Criticising syllogisms, I. 30, 32.
• Crystals, II. 129, 140.

• Darwinian theory, II. 208; see Evolution.
• Descartes, II. 134; methodic doubt of, I. 95, 96; clear ideas of, 168.
• Determinations of being, II. 14.
• Dialectics, I. 6, 7.
• Dialectic syllogism, 5. 49.
• Difference, specific, I. 13.
• Dilemma, I. 40, 42.
• Disjunctive, proposition, I. 20; syllogism, 36.
• Distant action, II. 85.
• Distinction, II. 40; of the sciences, I. 67.
• Distributed ideas, I. 16. II. 40; of the sciences, I. 67.
• Doubt, I. 78, 82; methodic, 95, 96.
• Dreams, I. 147; II. 168, 170.
• Dualism, II. 243.
• Dynamic theory, II. 130, 133.

• Effect, see Cause.
• Efficient cause, II. 81.
• Elements, of certainty, I. 84, 88; of matter, II. 126.
• Eminent cause, II. 84.
• Enthymeme, I. 38.
• Epicherema, I. 43.
• Equivocal, cause, II. 84; terms, I. 16.
• Equivocation, I. 57.
• Error, 1. 78 to 83.
• Essence, specific, I. 13; defined, II. 28; physical, metaphysical, 30; eternal, 30; knowledge of, 32; of God, 228.
• Eternity, II. 70, 245, 246; of punishment, 118, 215.
• Ethics, I. 1.
• Eucharist, Holy, II. 58, 134.
• Evasion, I. 54.
• Evidence, mediate, immediate, I. 18; defined, 167; the ultimate criterion of certainty, 169 170.
• Evil, II. 45, 241, 242, 267 spirits, 123 to 125; I. 147.
• Evolution, II. 156 to 158, 208 to 210, 226.
• Exemplars, II. 20, 21.
• Exemplary cause, II. 80.
• Exercise in reasoning, I. 69.
• Existence, II. 33; of God, 220, etc.
• Extension, of ideas, I 16; of propositions, 20; of predicate, 21; of bodies, II. 127, 132 to 134.
• Extreme terms, I. 29.

• Fallacies, I. 56, etc.
• Falsity, I. 73; II. 42.
• Fichte, II. 102; I. 144, 145.
• Figment of reason, II. 7.
• Figure, II. 136, 140.
• Final cause, II. 77 to 79.
• First, fact, principle, condition, I. 98; principles, 60, II. 35; cause, 83.
• Foreknowledge, II. 199; 250 to 252.
• Form, of syllogism, I. 19, 29; of living bodies, II. 144, 203 to 206; matter and, see Matter.
• Formal, Cause, II. 77, 84; objects of sciences, I. 67; object of metaphysics, II. 3, 8, 133.
• Free, will, the source of error, I. 81; cause, II. 83; will, in man, 194 to 199; in God, 255.

• Genus, I. 13 to 15.
• Geology, II. 111.
• Glory, II. 115, 153.
• God, defined, II. 219; exists, 220 to 227; essence of, 228; perfection of 233, 234; simplicity of, 235 to 238; attributes of, 239; unity of, 240, 241; immortality of, 243, 244; eternity of, 245, 246; omnipresence, immensity of, 247, 248; knowledge of, 250 to 253; will of, 254 to 257; holiness of, 258 goodness of, 239, 260; omnipotence of, 261 to 263; concurrence of, 264, 265; providence of, 266, 267.
• Goodness, II. 36, 43; kinds of, 44.
• Growth, II. 140, 143.

• Habiliment, II. 50, 73.
• Harper, Rev. Thos., II. 14, 41, 133.
• Highest genus, I. 14.
• Holiness, II. 258.
• Hume, I. 145; II. 53, 123.
• Huxley, I. 10, 164; II. 123, 155, 199, 201, 209.
• Hypnotism, II. 124.
• Hypothesis, I. 53.
• Hypothetic, proposition, 21; syllogism, 34 to 37; impossibility, II. 96.

• Idea, I. 9; abstract, concrete, 11; singular, particular, universal, 12; distributed, 16; primary, 119 to 121; not innate, II. 178, 180; how acquired, 180 to 183; of being not that of God, 15, 16; of infinity, 95.
• Idealism, I. 144; II. 102.
• Identity, II. 39, 57.
• Ignorance, I. 78, 82.
• Imagination, I. 105; II. 165.
• Immanent action, II. 65.
• Immensity of God, II. 247.
• Immutability, II. 98; of God, 243, 244.
• Impenetrability, II. 135.
• Indirect reasoning, I. 54. II. 135.
• Individuality, II. 41.
• Induction, I. 44 to 48, 170.
• Inertia, II. 138.
• Infinite, II. 92 to 94; idea of, 95; perfection, 253.
• Inhesion, II. 58.
• Inner sense, I. 103 to 105, 115; reliable, 139 to 141. II. 58.
• Instance, I. 54.
• Instinct, II. 149 to 152.
• Instrnmental cause, II. 83.
• Intellect, I. 107, 112, 113, 148 in action, receptive, II. 177, 182.
• Intellectual, memory, I. 110, 128 to 131; life, II. 139.
• Intelligence not in brutes, II. 148.
• Intuitions, I. 152.
• Invincible error, I. 80.
• Irrelevant conclusion, I. 58.

• Judgment, I. 17, 18, 108 a priori, a posteriori, etc., 17, 18, 63; speculative, practical, 79; analytic is reliable, 125 to 127; consequent on sense-perception, 142 to 151; of common sense, 156 to 164.

• Kant, II. 71, 130.
• Knowledge, of possibles, II. 19, 20; of essences, 32; of God, 250 to 233; see Cognition.

• Language, II. 189, 190.
• Laws of nature, II. 119 to 125.
• Leibnitz, II. 45, 53, 130, 206, 212.
• Liberty, II. 194 to 199; essence of, 197; kinds of, 255; of God, 256, 257.
• Life, II. 139, 140.
• Local motion, II. 137.
• Locke, II. 34, 53 57.
• Logic, I. 2, 5; formal, material, critical, 6, 70.
• Logical, order, I. 61; truth, falsity, 73 to 77; being, II. 11; distinction, 40; relation, 62; whole, 91.
• Lunacy, I. 118, 145.

• Major. terms, premises, I. 23 to 29; 32, etc.
• Material, logic, I. 6, 70; cause, II. 77.
• Materialism, II. 216.
• Matter, of syllogism, I. 19, 29; not self-existent, II. 104 to 107; divisible, 126 and form, 127, etc., 144.
• McCosh, II. 53.
• Memory, 1. 106, 110; reliable, 128 to 131 sensible, II. 166.
• Mesmerism, II. 123, 124, 172 to 174.
• Metaphysical, certainty, I. 86; essence, II. 30, 230, 231 truth, 72; whole, 91.
• Metaphysics, I. 1; II. 2 to 4; formal object of, 8.
• Method, I. 59 to 67.
• Methodic doubt, I. 95.
• Middle term, I. 29.
• Mill, J. S., II. 184.
• Minor, term, premise I. 23 to 29, 32.
• Miracle, II. 121 to 125.
• Modal accidents, II. 59; distinction, 40.
• Monads, II. 130.
• Moral, truth, I. 72; falsity, 73; certainty, 86, 87; II. 123; cause, 83; possibility, 18; good, 44, 45; evil, 115.
• Mosaic account of creation, II. 111.
• Motion, II. 69, 137.
• Multiplicity, II. 38.
• Mysticism, II. 186.

• Nature, of a being, II. 34; laws of, 119 to 123.
• Natural, appetite, II. 191; theology, 4, 218.
• Necessary, being, II. 96, 220; cause, 83.
• Negative argument, I. 54.
• Nominalists, I. 124; II. 184, 185.
• Notion, I. 9.
• Notional, essence, II, 230, 231.

• Objections, answers to, I. 55.
• Objects of, sense-perception, I. 48.
• Occasion, II. 82.
• Omnipotence, II. 260 to 263.
• Omnipresence, II. 247.
• Omniscience, II. 253.
• Oneness, see Unity.
• Ontological, order, I. 60; proof of God’s existence, II. 226, 227.
• Ontologists, II. 187, 188.
• Ontology, II. 4, 5.
• Operative attributes of God, II. 239.
• Opinion, I. 78.
• Order, I. 61; in the world, II. 222, 220, 224.
• Organs of sense, I. 102; action of, II. 195.
• Origin, of the world, II. 101; of ideas, 175 to 184; of language, 190; of the soul, 207 to 212.

• Paleontology. II. 157.
• Pantheism, II. 101, 203. 237, 238.
• Particular, ideas, I. 12; propositions, 20.
• Passion, I. 83; II. 50, 61, 63 to 65.
• Perception, I. 145 to 148; II. 160 to 163.
• Perfection, II. 43; absolute, relative, 117; of the world, 117, 118.
• Person, II. 55; identity of, 57.
• Phantasm, I. 20, 115.
• Philosophic certainty, I.. 85, 91.
• Philosophy, defined, I. 1; divided, 1; important, 4.
• Phrenology, II. 201.
• Physical, being, II. 11; good, evil, 45; beauty, 46; certainty, I. 86, 90, 91; II. 123; possibility, 18; essence, 30, 229, 232; cause, 74; whole, 91; laws, 119 to 125.
• Physics, II. 1.
• Physiology, II. 157.
• Place, II. 50, 66.
• Plants, II. 139, 140 to 243; 152 to 254.
• Plato, II. 101, 227, 202.
• Porphyrian tree, I. 25.
• Positivists, II. 34; moral, physical, 18. II. 34.
• Possible beings, II. 6, 7, 12, 17 to 27, 94; knowledge of, 19, 20, 94, 253; dependence of, on God, 22 to 27.
• Posture, II. 50, 72.
• Potentiality, II. 127, 128.
• Power of God, II. 260, 263.
• Predicables, heads of, I. 13.
• Predicaments, II. 48.
• Predicate, I. 19; extension, comprehension of, 20.
• Pre-established harmony, II. 206.
• Prejudices, I. 83.
• Premises, I. 23, 25, 29, 60.
• Preservation of created things, II. 263.
• Primary ideas, I. 119 to 121.
• Prime matter, II. 127.
• Principal cause, II. 83.
• Principiant, II. 74.
• Principle, of identity, contradiction, excluded middle, II. 35; of sufficient reason and causality, 86 to 88.
• Probable reasoning, I. 49.
• Procession, II. 74, 75.
• Proper objects of sense-perception, I. 148.
• Property, I. 13.
• Proportion, II. 47.
• Propositions, I. 19; kinds of, 25, 33.
• Providence of God, II. 266, 267.
• Psychology, II. 4, 139.
• Punishment, II. 115, 118; eternal, 215,
• Pure act, II. 237.
• Purpose, of work, of workman, II. 112 to 115.
• Pythagoras, II. 101.

• Quality, II. 50, 61; of proposition, I. 20.
• Quantity, II. 50, 60, 93, 94; of proposition, I. 20.

• Rational, cognition, II. 175, etc.; appetite, 191, 192.
• Real, being, II. 7, 8; relation, 62; distinction, 40.
• Realists, I. 124; II. 185.
• Reality of causes and effects, II. 85.
• Reason, I. 109.
• Reasoning, I. 22; rules of syllogistic, 32; demonstrative, probable, 49; indirect, 54; a priori, a posteriori, 62, 63; analytic, synthetic, 64 to 66; gives certainty, 132 to 134, 170.
• Redemption, II. 56.
• Reduplication, II. 135.
• Reid, I. 160.
• Relation, II. 50, 62.
• Retort, I. 54.
• Revelation, I. 3; II. 111, 118.
• Rules of syllogism, I. 30, 32.

• Sameness, II. 39.
• Sceptics, I. 93, 94, 97, 99; II. 85.
• Schoolmen’s, the, system, of matter and form, II. 127; of origin of ideas, 182.
• Science, I. 5; formal objects of a, 67.
• Scotus, II. 101.
• Self-contradiction, I. 54. II. 101.
• Self-existence, II. 104, 220, 239.
• Sensation, I. 135, 136; perceives concrete objects, 137; is reliable, 142 to 147; limits of its reliability, 139 to 140; how effected, II. 161 to 163; where effected, 164.
• Sense, outer, I. 101, 102, 138, 142 to 151; inner, 103, 104, 138 to 140; common, 103, 163, 164; perception, II. 160; objects of, I. 148.
• Sensible, memory, I. 106, 128; II. 166; judgments, 167; appetite, 191 to 196.
• Sensitive, cognition, II. 159 to 167; life, 139.
• Simple apprehensions, I. 8; truth of, 75 to 77.
• Simplicity, II. 90, 145; of the soul, 200; of God, 235 to 238.
• Singular ideas, I. 12; propositions, 20.
• Sleep, II. 168, 169, 172.
• Somnambulism, II. 171.
• Sophisms, I. 56.
• Sorites, I. 39, 40.
• Soul, the form of the body, II. 204 to 206; the human, is simple, 200, 201; spiritual, 202, 203; when created, 200, 202; survives body, 203; immortal, 204.
• Space, II. 67 to 69, 137.
• Species, I. 13 to 15; Eucharistic, II. 134; of plants and animals are fixed, 156, 157; impressed, expressed, II. 162, 163.
• Specific difference, I. 13 to 15.
• Spinoza, II. 52, 101.
• Spirits, II. 66, 137; I. 147.
• Spiritism, II. 174.
• Spontaneous, II. 193.
• Subordinate, genus, species, I. 14.
• Substance, II. 49, etc.
• Substantial, cause, II. 77; principle, 132, 144, 145.
• Suffering, II. 240, 267.
• Sufficient reason, II. 86 to 88.
• Supposit, II. 55.
• Suspicion, I. 78, 82.
• Syllogism, I. 23; construction of, 24, 25; abridged form of, 27; affirmative, negative, 28; parts of, 29; valid, 30; rules of, 30, 32; hypothetical, 34 to 37.
• Synthetic, judgment, I. 17; reasoning, 64 to 66.

• Term, I. 10, 16, 29, 30, 32.
• Thomas, St., I. 91; II. 40, 108, 110, 118, 127.
• Time, II. 50, 70, 71.
• Traditionalism, II. 179.
• Transcendentals, II. 9.
• Transient action, II. 65.
• Transubstastiation, II. 99.
• Trinity, the Holy, II. 74, 237.
• True, beauty, II. 47; good, 44.
• Truth, I. 72 to 77; II. 36, 42.
• Tyndall, II. 155.

• Ultimate, criterion of certainty, I. 165 to 170; particles of matter, II. 127.
• Undue assumption, I. 58.
• Unity, II. 36 kinds of, 37; of God, 240, 242.
• Universal, ideas, I. 12, 13, 122, 124; direct, reflex, II. 183, etc.; proposition, I. 20; major, 25; cause, II. 84.
• Universe, II. 100; see World.
• Univocal terms, I. 16.

• Valid, syllogism, I. 30; induction, 48.
• Vegetable life, II. 139.
• Virtual cause, II. 84.
• Vital, principle, II. 127, 129, 139 to 148; acts, 59.
• Voluntary, II. 193.

• When, II. 63, 70.
• Whole, II. 91.
• Will, II. 181, 192; antecedent, consequent, 116; of man is free, 198, 199; of God, 254 to 255.
• Wisdom of God, II. 253.
• World, II. 100: origin of the, 100 to 110; age of the, 111; perfection of the, 117; purpose of the, 112 to 115.