consuetudo bonorum hominum, intercourse with good men.

1.  This relation is often expressed by means of prepositions; as,—­

    amor erga parentes, love toward one’s parents.

201.  Genitive of the Whole.  This designates the whole of which a part is taken.  It is used—­

1.  With Nouns, Pronouns, Comparatives, Superlatives, and Ordinal Numerals; as,—­

    magna pars hominum, a great part of mankind;

    duo milia peditum, two thousand foot-soldiers;

    quis mortalium, who of mortals?

    major fratrum, the elder of the brothers;

    gens maxima Germanorum, the largest tribe of the Germans;

    primus omnium, the first of all.

  a.  Yet instead of the Genitive of the Whole we often find ex or de with
  the Ablative, regularly so with Cardinal numbers and quidam; as,—­

    fidelissimus de servis, the most trusty of the slaves;

    quidam ex amicis, certain of his friends;

    unus ex militibus, one of the soldiers.

  b.  In English we often use of where there is no relation of whole to
  part.  In such cases the Latin is more exact, and does not use the
  Genitive; as,—­

    quot vos estis, how many of you are there?

    trecenti conjuravimus, three hundred of us have conspired (i.e. we,
    three hundred in number).

2.  The Genitive of the Whole is used also with the Nominative or Accusative Singular Neuter of Pronouns, or of Adjectives used substantively; also with the Adverbs parum, satis, and partim when used substantively; as,—­

    quid consili, what purpose?

    tantum cibi, so much food;

    plus auctoritatis, more authority;

    minus laboris, less labor;

    satis pecuniae, enough money;

    parum industriae, too little industry.

  a.  An Adjective of the second declension used substantively may be
  employed as a Genitive of the Whole; as, nihil boni, nothing good.

  b.  But Adjectives of the third declension agree directly with the noun
  they limit; as, nihil dulcius, nothing sweeter.

3.  Occasionally we find the Genitive of the Whole dependent upon Adverbs of place; as,—­

    ubi terrarum? ubi gentium? where in the world?

a.  By an extension of this usage the Genitive sometimes occurs in dependence upon pridie and postridie, but only in the phrases pridie ejus diei, on the day before that; postridie ejus diei, on the day after that.

202.  Appositional Genitive.  The Genitive sometimes has the force of an appositive; as,—­

    nomen regis, the name of king;