Galen; De Decr. Hipp. et Plat. = De Decretis Hippocratis et Platonis. Euseb. = Eusebius; Pr. Ev. = Praeparatio Evangelii. Aug. or August. = Augustine; Contra Ac. or C. Ac. = Contra Academicos; De Civ. Dei = De Civitate Dei. Quintil. = Quintilian; Inst. Or. = Institutiones Oratoriae. Seneca; Ep. = Epistles; Consol. ad Helv. = Consolatio ad Helvidium. Epic. = Epicurus; Democr. = Democritus. Madv. = Madvig; M.D.F. = Madvig's edition of the De Finibus; Opusc. = Opuscula; Em. = Emendationes ad Ciceronis libros Philosophicos; Em. Liv. = Emendationes Livianae; Gram. = Grammar. Bentl. = Bentley; Bait. = Baiter; Dav. = Davies; Ern. = Ernesti; Forc. = Forcellini; Goer. = Goerenz; Herm. = Hermann; Lamb. = Lambinus; Man. or Manut. = Manutius; Turn. = Turnebus; Wes. or Wesenb. = Wesenberg. Corss. = Corssen; Ausspr. = Aussprache, Vokalismus und Betonung. Curt. = Curtius; Grundz. = Grundzüge der Griechischen Etymologie. Corp. Inscr. = Corpus Inscriptionum Latinarum. Dict. Biogr. = Dictionary of Classical Biography. Cf. = compare; conj. = 'conjecture' or 'conjectures'; conjug. = conjugation; constr. = construction; ed. = edition; edd. = editors; em. = emendation; ex. = example; exx. = examples; exc. = except; esp. = especially; fragm. = fragment or fragments; Gr. and Gk. = Greek; Introd. = Introduction; Lat. = Latin; n. = note; nn. = notes; om. = omit, omits, or omission; prep. = preposition; qu. = quotes or quoted by; subj. = subjunctive. R. and P. = Ritter and Preller's Historia Philosophiae ex fontium locis contexta. * * * * * THE ACADEMICA OF CICERO. INTRODUCTION. I. _Cicero as a Student of Philosophy and Man of Letters:_ 90--45 B.C. It would seem that Cicero's love for literature was inherited from his father, who, being of infirm health, lived constantly at Arpinum, and spent the greater part of his time in study.[1] From him was probably derived that strong love for the old Latin dramatic and epic poetry which his son throughout his writings displays. He too, we may conjecture, led the young Cicero to feel the importance of a study of philosophy to serve as a corrective for the somewhat narrow rhetorical discipline of the time.[2]