The paper is concerned with explaining some of the principal theoretical developments in elementary particle physics and discussing the associated methodological problems both in respect of heuristics and appraisal. Particular reference is made to relativistic quantum field theory, renormalization, Feynman diagram techniques, the analytic S-matrix and the Chew — Frautschi bootstrap.

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This comes near to satisfying; but even with ipsa the change of subject from tecta to plaustra is awkward, and exsultant is inappropriate to a lumbering plaustrum . I suggest reading cisia instead of ipsa. The cisium was a fast light two-wheeled vehicle which might well jump up on a rough road; and the first three letters cis could have become the -es of the MS exsultantes. Two further points: lapis uiai is not ‘a stone on the road’ , but (...) rather the stone of the road, i.e. the paving; and utrimque is not ‘on one side or the other’ but ‘on both sides’. There remains Ernout's objection that the suppression of the final s of lapis is unlikely. One can only say that no one would have ventured to introduce by conjecture pendentibu' structas or manantibu' stillent, but both are found in Lucretius' text. (shrink)

Ancient rhetoric divided the questions which concerned the orator into the definite and the indefinite, quaestiones finitae and quaestiones infinitae, the former concerned with particular persons and occasions, the latter without any such reference. To take a simple example from Quintilian, ‘Should one marry?’ is a quaestio infinita, ‘Should Cato marry?’ a quaestio finita. The distinction was introduced, or at any rate first clearly formulated, by Hermagoras in the second century B.C., and became an established part of rhetorical theory. The (...) Greek term for the indefinite, or general, question was none of the various Latin equivalents used by Cicero attained general currency, and the Greek term prevailed. (shrink)

nihil autem uetabat et componi materias in hoc idoneas, ut controuersiae permixtis salibus fingerentur, uel res proponi singulas ad iuuenum talem exercitationem. quin illae ipsae , quas certis diebus festae licentiae dicere solebamus, si paulum adhibita ratione fingerentur, aut aliquid in his serium quoque esset admixtum, plurimum poterant utilitatis adferre; quae nunc iuuenum uel sibi ludentium exercitatio est.