" End organs " of nerves, 730. Ende, Francis Van der, 345. Endoxa, in Aristotle, 418. Enthymeme, 481. Entia rationis, 311, 750. 'ETrixfipr][j.a, what? 505. Epictetus, 400; his Aiarplfiai, 496. Epicurus, 126, 421; literature of his life and philosophy, 421. Epigram, its nature, 481. Episcopius, Simon, 179, 733; his "De libero arbitrio," 179. Equations: " ordinary " or algebraic, LEIBNITZ'S CRITIQUE OF LOCKE 425; "extraordinary" or transcen dental, 425$ reduction of, 571.
Eratosthenes, 93.
Ermerins, F. Z., his " Hippocratis et aliorum medicorum reliquae," 476.
Erpenius, 287.
Esoteric teachings, 272.
"Ethereal vehicles" for spirits, 380, Ethics, its truths founded in natural theology, 496.
Eucharist, Lutheran view of, 611.
Eucken, Rudolph, his "Fundamental Concepts of Modern Philosophical Thought," 227, 239; his " Gesch. und Kritik der Grundhcgriffe der Gegen- wart," 758; his "Die Grundbegriffe der Gegenwart historisch und kri- tisch entwickelt," 758.
Euclid of Alexandria, 93; his response to Ptolemy, 93; commentators.upon, 108; his Elements reduced to syllo Eutocius of Ascalonita, 465.
Evolution, theory of, hinted at by Leibnitz, 347.
" Ex professo," 739.
"Exception, some," 728.
Exclusion, a method of, 413.
Existence, what? 401.
Existence of God, Descartes on, 502; Spinoza on, 502; Leibnitz on, 502; Anselmic argument for, 503.
Exoteric teachings, 272.
Experience, its incompetency, 725.
" Experientia," its use among Scho lastics, 724.
Eye, "accommodation" of the, 228; men with only one, 389; Maurolico upon the, 442.
Fabri, Honore, 586; disputes with Sen- nert upon the immateriality of the souls of animals, 488; his " Synopsis Geometrica," 586; his " Physica seu scientia rerum corporearum," 586; his " Summula Theologiiu," 586; as sists Divini in the controversy with Huygens, 614.
Fabricius, John Lewis, 102; saves the Heidelberg archives, 102; his " Apo logise generis humani contra calum- niam Atheismi," 102; letter to Spi Farrar, F. W., his " Seekers after Fedais, the devoted ones, 197.
Feder, " Commercii epistolici Leibni- Feeling, defined, 736; and ideas, their relations, 754.
Felden, Johannes, 636.
Feller, his " Otium Hanoveranum," 595; edits "Miscellanea Leibniti- Felwinger, 635.
Fergil, St., 443.
Fermat, Pierre de, 213, 393, 465, 466, 571; his " De Maximis et Minimis," 465; " Opera Mathematica," 571.
Ferrari, Luigi, 572; resolves equations of third and fourth degrees, 572.
Ferri, L., his "La Psicologia di P. Pomponazzi," 581.
Ferro, Scipione del, 571; solves cubic equations, 571.
INDEX C Feyerabend, 626.
Fiymenta mentis, 623.
Figure, syllogistic, the invention of the Fourth, 408.
Fiore, Antonio del, 571.
Fire, as (ppovi/mov, 7211.
Florentinus, 735.
Fludd, Kohert, his " Philosophia Mo- saica," 63, 730; his " Utrumque Foerster und Koschwitz, their " Alt- franzosisches Uehungshuch," 294.
Fontenelle, Bernard le Bovier de, his " Entretiens sur la pluralite des inondes," 550; his " Elogc de Leib niz," 550; his "Dialogues des Morts,"551; " Doutes sur le systeme physique des causes occasionelles," Fontanier-Pellisson, Paul, 591: corre sponds with Leibnitz, 591: his " His- toria 1'Academie Francaise," 591; his "Traite de 1'Eucharistie," 591; his " Reflexions sur les differends en matiere de religion," 591.
Force, primitive and derivative, 721.
Forms, substantial, their origin, 349; Locke's view of, 349; Leibnitz's view Foucher de Careil, his " Lettres et opuscules inedits de Leibniz," xii, 677, 748, 757; " Nouvelles lettres et opuscules inedits de Leibniz," xii, 101, 420, 496, 728, 748, 750, 752, 775; his "CEuvres de Leibniz," xii, 532, 544, 591, 592, 629, 737, 740, 757, 765; his " Leibniz et Pierre le Grand," Foucher, Simon, 420; "the restorer of the philosophy of the Academy," 420: his "Critique de la Recherche do la Verite," 420: Malebranehe crit icises, 420: his objections to doctrine of Pre-established Harmony, 420; his correspondence with Leibnitz, 420.
Freedom, ethical, distinguished from free-will, 752.
Freigius, J., 311.
French version of Locke's Essay, 728.
Fre'nicle de Bessy, Bernard, a rapid calculator, 393; his method, 393; his "Traite des triangles et rectangles in nornbres," 393.
Fre'nicle, Nicolas, poet, 393.
Friedlein, G., edits works of Proclus, Fries, G. F., his " Neue Kritik der Vernunft," 764.
Frisch, Ch., edits Kepler's works, 123.
Froben, edits "Alcuini Opera," 546.
Froidmont (Fromont) Libert, 234; his " Labyrinthus sive de compositione continui," 234.
Fuchs, a botanist, 308.
Gabelentz and Loebe, their " Ulfilas," Gaius, his " Elements of Roman Law," Galenus Claudius, 407; his "De usu purtium corporis humani," 407; bis " Opera omnia," 408; invents fourth syllogistic figure, 408.
Galileo, paves the way to formulation of law of gravitation, 440.
Ganzarini, Tito Giovanni, il Scandi- anese, 399.
Garner, R. L., on language of mon keys, 764; his " Speech of Monkeys," Gass, W., his " Gesch. d. protestant- ischen Dogmatik ihrem Zusammen- hange mit der Theologie," 589, 595.
(iasscndi, Pierre, 64, 65, 730; attacks doctrine of intentional species, 382; on Epicurus, 421: his " Syntagma Philosophicum," 421; " Gassendy," his Cinquieme Objections," 731; on vacuum, 774.
LEIBNITZ'S CRITIQUE OF LOCKE " Gaunersprache," its composition, Gaunilo, 502; his "Liber pro Insipi- Gauss, Carl Friedrich, his " Theo- ria motus corporum cuilestium," Gautier, L., his "(Euvres Poetiques d'Adam de St.-Victor," 603.
Gayard, his "Fragments relatifs a la doctrine des Ismaelis," 197.
Genera and species, the philosophies of Locke and Leibnitz most sharply divergent on, 310.
" Generation, spontaneous," 346.
Gergo, 293.
Gerhard, J., 587.
Gerland, E., his " Leibnizens und Huy- gens Briefwechseln," 343.
Gesner, Conrad, " the German Pliny," 626; makes the first attempt at a literary encyclopedia, 626; his " Bibliotheca Universalis," 626.
Gibbon, Edward, his "Decline and Fall of the Roman Empire," 197, Gilbert, William, earliest methodical experimentalist, 774; his " De mag- nete magneticisque corporibus," 774.
Glanvill, Joseph, 631.
Glass, Pliny on flexible, 316.
Gobien, Charles A., 104; his " Histoire des Isles Mariannes," 104.
Goclen, R., 311; his " Lexicon philoso- phicum," 311; his " Isagoge in Orga- num Aristotelis," 311; his regressive sorites, 311; mediates between Aris totle and Ranius, 408.
God, as place of things, 153; as ac.tus punts, 159; omnipresence of, dyna mic, 159; his veracity, its place in Cartesian system, 319; his existence required by doctrine of monads, 363; the scholastic distinction of will and understanding in, 462; object of man's highest moral aspiration and effort, 496; source of all truth and of all beings, 517.
Godwin, Francis, his "Man in the Goabel, 602.
Gobi, Jacob, 287, 468; his "Lexicon Arabico-Latinum," 287.
Gottling, 379.
Gombault, Antoine, 539.
Gonzales, Domingo, his "Voyage chi- merique au monde de la lime," 342.
Gonzalez, Tirso, opposed probabilism, 418; his " Fundamentnm Theologian moralis, tractatus de recto usu opi- nionum probabilium," 418.
Goppert, his " Ueber einheitliche, zusaniinengesetzte und Gesammt- sachen nach rom. Recht," 759.
Gorgias, 518.
Goropius, see Becan.
Gow, his " Short History of Greek Mathematics," 527. [295.
Graff, E. Tli., his "Gospel of Otfrid," Grammatical confusion in the text ex plained, 768.
INDEX C sir?
Grant, Alex., his " Ethics of Aris Greaves, John, his " Pyramidogra- Green, when the product of blue and yellow, 320.
Gregory, IX., 444; XIII., reforms the Calendar, 424.
Gretser, Jacob, (J18; his response to magistrates of Marckdorf, <>18.
Grimaldi, Charles Philip, 394.
Grimm, Jacob, his " Kleinere Schrif- ten," 294; his " Deutsches Worter- Groot, see Grotius.
Grotefend, C. L., his " Briefwechsel z. Leibniz, Arnauld und Landgratiu Grotius, Hugo, 636; founder of phi losophy of law, 494; on man as a social animal, 285; his "I)e Jure Belli et Pads," 285; his " Epistohe ad Gallos," 494.
Ground-truths, theoretical, how con- scions of, 735; practical, how con scious of, 735.
Guericke, Otto von, 774; experiments on vacuums, 127; his air-machine, 127; " Experimenta nova ut vocant Magdeburgica," 127.
Guerre, Martin, the story of his per sonation, 310.
Guerrier, <>29.
Guyou, Mine., 728.
Haaxmau, biographer of Leeuwen- Hadley, " Introduction to Roman llagenbach, bis " History of Doc Hakluyt Society, the, 89.
Hamm, Ludwig, 346.
Hammer, Von, his " Gesch. d. Assassi- Hardy, Claude, his " Data Euclidis," Harlay, Archbishop of Paris, 348.
Harris, W. T., "Journal of Specula tive Philosophy," 8.
Harrison-Verrall, his " Mythology and Monuments of Ancient Athens," 390.
Hartenstein, his "Locke's Lehre von der menschliehen Erkenntniss in Vergleichung mit Leibniz's Kritik derselben," 5,311; his " Hist. Philos. Abhandlungen," 311, 349; his edition Harvey, William, 346.
Harzer, P., his " Leibniz's dynamische Ausschauungen," etc., 775.
Hasbishin, 197.
Hasse, his " Auselm von Canterbury," Haureau, Barthelmy, his " Histoire de la Philosophic Scholastique," 349, 382, 503, 588; his " De la philosophic scholastique," 767.
Haurisius, his " Scriptores Historian Romanae Latiui veteres qui extant Heath, James, his "Flagellum; or Life and Death, Birth and Burial of Oliver Cromwell," 543.
Hebrew in Gaunersprache, 292.
Hedge, F. H., in " Journal of Specula Heereboord, Adrian, 633.
Hegel, his "Gesch. d. Philos.," 108, 15(>; on Boehme, 298; his " Vorles- ungen iiber Beweise von Dasein Gottes,"503; emphasizes like Leib nitz the concrete, 749; agrees with LEIBNITZ'S CRITIQUE OF LOCKE Leibnitz's view of absolute, 750; in terprets Leibnitz's Principle of Indi- viduation, 760.
Helmont, Francois, Mercure van, 67, 101, 242; his " Opuscula philoso- phica," 242; his relations with Leib nitz, 242; Leibnitz writes his epitaph, 242; physician of the Countess of Connaway, 732; — John Baptiste Hendriks, Frederic, his " Contributions to the History of Insurance," 540.
Henke, E. L. Th., his " Georg Calixtus und seine Zeit," 582.
Heppe, his " Gesch. d. Pietismus," 602.
Heraclitus, 729.
Herbart, J. F., on "working over of notions," 463.
Herbell, J. F. M., translator of Camper, 286.
Herbert of Cherbury, Lord Edward, 587; his "De Veritate," 95.
Herlinus, Christian, collaborator with Dasypodius upon the " Analyses Geometricae," 404; Hamilton's opin- iiui of, 769; where examples of the Analysis of, may be found, 769.
Hermathena, of Trinity College, Dub Herostratus, the incendiary, 536.
Hertz, Wilhelm, 67.
Herzog, his " Realencyclopadie," 296, Higginson translates Epictetus, 496.
Hippocrates, of Chios, 527; determines area of lune, 527; — of Cos, 476, 527: "Father of Medicine," 476; based practice of physic on observation, 476; enforced dietetics, 476; his Aphorisms, 476; his (TV/J.TTVOLO. iravra., conspirantia omnia, 476.
" Histoire des Ouvrages des Savants," Hobbes, Thomas, 93, 285, 450: his " De Corpore," 93; his " Six Lessons to the Professors of Mathematics," 93; his " De Give," 285; his "Leviathan," 285, 450; his doctrine of Society, 285; on truth, 450; a Nominalist, 450; literature upon the teachings of, 450: his "Leviathan" censured by Parliament, 775.
Holden, Henry, his " Divinne Fidei Analysis," 617; his controversy with Aruauld, 617.
Holt/.endorff and Virchow, their " Sammlung wisseuschaftlicher Vor- Ilonestutu and utile, 261.
Honorius, his " gallus pugnax," 610.
Hooghelande, Cornelius Van, 633.
Hooke, Robert, his " Micrographia," Hooker, Richard, his " Laws of Eccle siastical Polity," 566.
Hoole, Samuel, translator of Leeuwen- Hottentots, language of, 290.
Hughes, his "Loyola, and the Educa tional System of the Jesuits," 619.
Hugony, 9.
Hultsch, F., his " Pappi Alexandrini Collectiones quae supersunt," 521.
Humanities, 628.
Hume, accords with Leibnitz on basis of morals, 735; " Inquiry concerning the Principles of Morals," 735; his " Treatise of Human Nature," 736; on Causes, 757.
Hunt, T. W., his " Caedmon's Exodus and Daniel," 295.
Huygens, Christian, 150, 213, 539, 676, 723; his"Traite'delaLumiere," 150; discovers double refraction, 150; places the wave theory of light on a sure foundation, 150; applies the pendulum to the clock, 150; his " De scription de 1'horloge a pendule," 150; experiments on the isochronous pendulum, 150; his"De Ratiociniis aleae ludo " 539; his " Cosmotheo- ros," 550; his speculations concern ing planets, 550; controversy with Divini, 614; his " De motu corporum ex percussione," 676; his " CEuvres completes," 723.
" Hypothesis physica nova," its struct INDEX C Ibn-al-Baitar, see Baitar.
Idatius, Chronicle of,!)9.
Ideas, tlieir natural order, 289; pure truths of reason, 325; their content, 325; their realization, 325; in what sense "true" or "false," 452; in Divine Mind as rationes rerum sta- bilt's et incoinmutabiles, 51(i; in nate, their criterion, 733; simple, mind active in reference to, 703.
Idenlitatis, principium, 509; indiscernibilium, principium, 332. Idiov, 455.
Idola Fori, omnium molestissima, 300.
Illyricus, Matthias Flacius, 294.
linage and Idea, 274.
Innnams, 197.
Immediate Revelation of God to Soul, Locke's statement concerning, 474.
Infactum, an action at law, 480.
Incessabilite, 245.
Independents, 000.
Indirect demonstration, 400, 491.
Indiscernibles, principle of, 332.
Individual, the, its existence alone allowed by Locke, 507.
Individualism, nominalistic, 023.
Individuation, principle of, 239.
Inductive conclusions founded on " truths of fact," 493.
Infants, concerning their salvation, Infinite, the syncategorematic and cat- egorematic, 101, 102; whence the errors and difficulties in discussion of, 274; cannot form an image of, 274; knowledge of the, denied, 274; " trois sens du mot," 750.
Infinite series, 424.
Infinitesimal calculus, its application in Newton's " Principia," 440; dis covery of, 573.
Infinitivum, indefJnitum, 102.
Inspiration, Divine, gives " lumen Gratiae," 570; regarded as associ ated with mental derangement, 598.
"Instinct," how used by Leibnitz, Insurance, John de Witt, its first sci entific propounder, 540.
Intelligence, The Supreme, His rela tion to ideas, 703.
Intuition, immediate, of Plato, 575.
"Inward Light" of William Penn, Ionic School of Philosophy, 519.
Jackson, H., on the 8a.ifj.bvi.ov of Soc rates, 598.
Jacoby, D., his " De Leibuitii studiis Aristotelis," 753.
" Jalkut Chadasch," 242.
James, W., his " Psychology," 760.
Jaucourt, his " Ilistoria vitse Leib Janney, his "Life of William Penn," Janseu, H. C., translator of Camper, Je ne say quoi, applied to ultimate essence of things, 128.
Jerome, his "Ad Ctesiphontem," 345.
Jerome de la Lande, 551.
Jesuits, 418.
Jevons, W. S., his " Principles of Sci ence," 214; " Lessons in Logic, "322; his " Substitution of Similars," 509.
Jocher, his " Allgemeines Gelehrten- LEIBNITZ'S CRITIQUE OF LOCKE "Journal," " des Savants," 15, 101, 420, 507; "of Speculative Philoso Crelle, 571; " of Philology," 598.
Jowett, translator of " Politics of Aris totle," 285,482; translator of "Dia logues of Plato," 291, 292, 298, 390.
Julius, Duke, his decision in the case of Martin of Helmstadt, 582.
Jung, Joachim, 636.
Jurists, the Roman, Leibnitz's opinion Jus accrescendi, 434.
Jus non ex reyula sumatur, sed ex Justin Martyr, his "Apologies," 591; his " Spermatic Logos," 591.
Justinian, his " Institutes," 434, 487, " Kabbala " on pre-existeuce of souls, Kadlubek, Vincent, his " Historia Polouica," 546.
Kalbkopf, see Moscherosch.
Kant, his " Kritik d. prakt. Ver- nunft," 184; his "Die Religion in- nerhalb der grenzen der blossen Vernunft," 248; his "Kritik d. rein. Vernunft," 128, 332, 503, 733; " Di- lucidatio nova," 332; his a priori (necessary and universal) and a posteriori (contingent and actual) thought, 725; his Kategories or original notions of the understand reason, 733; refers to Copernicus, 733; his reason practical, 754; his definition of "virtue," 754; his ground of faith in immortality, 755.
Keckermann, Earth., 311; his proof of Trinity, 589; his " Systemass. Theo logian," 589; his "Opera omnia," Kelle, J., his " Gospel of Otfrid," 295.
Kepler, John, 123; his " Somnium seu de Astronomia lunari," 551.
Kerkkrinck, Theodore, his " Anthro pogenic Ichnographia," 345.
Kessler, Andreas, his <t Physical Pho- Exainen," 580; his " Met aphysicaj Photinianse Examen, "586; his " Logicae Photiniana; Examen," Kestner, his " MedicinischesGelehrten- Lexicon," 521. King, his "Life and Correspondence of Locke," 728. Kirchmann, J. II. von, his " Philos.
his "Die klein. philos. wichtig.
J. Locke's Versuch. vi. d. menschl.
Verstand," 555; his " Erlauterungen Kleutgen, his " Philosophie d. Vor- Klopp, O., his "Die Werke v. Leib Knowledge, mediate and immediate, 109; its relation to Kant's division of, 109; of senses, how classified, 317. Konig's " Appel," 713. Kortholt, Christian, his " Leibnitii Epist. ad diversos," 415, 486, 60(5, letter to, 436. Koschny, Erick, 218. Krafft, his " Kirchengesch. d. deutsch.
Volker," 296. Krauth-Fleming, their "Vocabulary of Philosophical Sciences," 125, 136, Kuhlmann, Quirin, his hallucination and fate, 601. Kummer, his " Festrede am Leibniz- Labadie, Jean de, 602.
Lal>adists, 602.
Labbe', Philippe, 293; his " Concordia chronologica, technica et historica," 293; his " Eruditae pronuntiationis catholici indices," 293. Lacoste, Bertram! de, his " Scheda de inventa quadratnra circuli," 604. Lactautius, 327.
INDEX 0 Laertius, Diogenes, his " De vitis, dog- inatibus, et apophthegmatis claro- rum philosophorum libri decem," Lagrange, Jos. Louis, 393.
Lallemant, Avc, his "Das deutsche Gaunerthum," '292.
Lambert of Auxerre, his " Summa Logics," 322.
La Mothe le Vayer, Francois de, 593; his " De la vertu des pa'iens," 593.
Lang, Andrew, his " Myth, Ritual and Religion," 85.
Langley, Alfred G., his article, "Reve lation, Inspiration and Authority," in " Andover Review," 32, 195.
Language, an aid to society, 280; of apes, 286; Leibnitz's mistake as to its origin, 288; involves advance to abstract ideas, 290; early discus sions upon, 291; Leibnitz upon for mation of, 292; modern discussions upon, 292; philosophical, 292, 375.
Languages, Leibnitz's presentiment of their connection, 297; the compara tive study of, recommended, 298.
Laplace, his " Theorie analytique des probabilite's," 213.
Larousse, P., his " Dictionnaire uni- versel du XIXe siecle," 310, 443, 494, Lasiks, 197.
Lateran Council, the fifth, 581.
Laurie, S. &., his "Comenius," 466.
Leclerc, his " Bibliotheque universelle et historique," 2(5.
Leeuwenhoek, Anton van, discovers spermatozoa and capillary circula tion, 346; opposes "spontaneous generation,".'!4(i.
Leibnitz, Gottfried Wilhehn; his " Meditationes de Cognitione, Veri- tate et Ideis," 3, 14, 17, 227, 2<56, 317, 363, 404, 502; his correspondence with Bicrling,::, 101, ]:;i. 4:;<;, 542, 7'_'1, 74S; liis correspondence with Burnet, (i, 7, 382, 458, 478, 59!», 728; anonyiiidiis letters of, 8, 712; cor respondence with Coste, 9; cor respondence with Remond, 9, 101, 131,731; correspondence with Lady Mashani, 9, 65; titles given by him self to his review of Locke's Essay, 9. 10, (55; his use of parentheses in " Nouveaux Essais," xiv, 10; his " Eclaircissement des ditHculte's quo M. Bayle a trouvees dans le systcme nouveau de 1'union de I'ame et du corps," 50: his remarks on " Rora- rius," 66, 507; his " Considerations sur la Princii)e de Vie et sur les Natures plasticines," 67, (58, 363, 731; his relation to Spinoza, 69; his " Sys tcme nouveau de la nature," 101, 147, 154, 34(5, 349, 3(53, 733; his " Res ponse sur reflexions contenues dans la seconde edition de Dictionnaire critique de M. Bayle," 101, 333, 508, 539; his correspondence with R. Ch. Wagner, 101, 131, 379, 550, 559; his correspondence with Fardella, 101; his correspondence with Dan- gicourt, 101: his correspondence with Arnauld. 101, 334, 426, 463, 553, 739; his " De ipsa natura," 101, 154, dence with Des Bosses, 101, 128, 131, wit h De Voider, 101; correspondence with Bourguet, 101, 213, 43<5, 5(51; correspondence witli von Hessen- Rheinfels, 101: his " Un petit dis- coursdeMetaphysique," 101, 261, 319, 330, 349, 49(5, 553, 554; his " Specimen dynamiciim pro adinirandis naturae legibus." 101, 171, 383, 670. 733, 751; his "Principe de la Nature," 101; his " La Monadologie," 101. 225,332, 502, 511, 733; his correspondence with Clarke, 128,,".32,:W1, 3X3, 553, 749, 750; correspondence with Tolo- mei, 131; his '' De aniina briitoriim," 131; his " Principes de la nature et delagracefondesen rais " i:«!,316, 363, 502; his "Codex juris gentium LEIBNITZ'S CRITIQUE OF LOCKE diplomaticus," 167, 495, 496, 750; his " De notionibus juris et justitiae," 167; his " De primae philosophise emendatione," 154, 174; his corre spondence with Fabri, 174, 586, 67(i, (509, 751; his " Essais de The'odice'e, " 180, 227, 239, 310, 333, 334, 349, 382, 383, 415, 450, 49(5, 508, 511, 551, 553, 576, 581, 582, 585, 5S(i, 587, 589, 590, on logic of probabilities, 213; ac quainted with Pascal's investigations on probabilities, 213; on creation, 225; his correspondence with Bayle, 225,261,334; his " Disputatio Meta- physica de principio individni," 239, 606, 623; correspondence with Sophie Charlotte, 239, 748; his "Miscel lanea," 242, 435, 443, 539, 590; his "De stilo philos. Nizolii," 272, 450, 588, 023; his correspondence with Geheimrath von Ilgen, 293; his corre spondence with Fr. S. Loeflier, 298; was an idealistic realist, 319; his "Animadversiones in partem gener- alem principiorum Cartesianorum," 334, 363, 504; his views of substan tial forms, 349; "Leibniz gegen Descartes und den Cartesianismus," 363; on Pythagoras, 379; his opinion of formal Logic, 379, 559; his corre spondence with G. Wagner, 379, 559; correspondence with Placcius, 382, 435,520; correspondence with editor of " Journal des Savans," 383; cor respondence with Alberti, 383; cor respondence with Thomasius, 383, 606, 631, 769; correspondence with Hobbes, 387, 450; correspondence his " Epist. ad di versos," ed. Kor- tholt, 417, 486, 748; correspondence with S. Kortholt, 436, 438, 649, 748; correspondence with Foucher, 420, 677; correspondence with Male- branche, 421; his infinite series, 424; his infinitesimal calculus, 424, 573; correspondence with Con ring, 425, 504, 520, 521, 769, 771; his " De vera proportione circuli ad quadratuin circumscriptum in numeris ration- alibus," 425; his "Thesis de conditionibus," 434; his " Specimina Juris," 434; his " De Arte Com- binatoria," 434, 561; on Weigel, 435; his criticism of Pufendorf, 436; his " Monita quaedam ad S. Puffen- dorfii principia," 436; his "Pre'- ceptes pour avancer les sciences," 437; a philosophical fragment, 437; his " Reflexions sur 1'ouvrage que M. Hobbes a public' de la liberte, de la necessite et du hazard," 4.r)0, 451; on Revelation, 474; his " Uni- cum opticae catoptricae et dioptricoa principium," 484; his "Nova me- thodus diseendae docendaeque juris- prudentiae," 486; his " Nouvelles lettres et opuscules inedits," by Foucher de Careil, 496; on rela tion of Natural Theology to Meta physics, 496; his letter to Electress Sophie, 496; source of ethical truth according to, 496; his " Definitiones ethicae," 496; on ontological argu ment for existence of God, 502; his doctrine of Monads requires ex istence of God, 502; his " De la de monstration Cartesienne," 502, 504; his " Confessio Naturae contra Athe- istas," 502; his correspondence with Jacquelot, 504; his correspondence with Eckhard, 504; his " Probatio existientiae Dei ex ejus essentia," 504; correspondence with Basnage de Beauval, 507, 727; his " Observatio ad rescensionem libri de fidei et rati- onis consensu a Domino Jacqueloto