Deficiency of accent is the most common of all the variations, if we understand by "accent" such syllabic stress as would be ordinarily appreciable in the reading of the word in question. It would be safe to say that in English five-stress iambic verse, read with only the ordinary etymological and rhetorical accents, twenty-five per cent of the verses lack the full five stresses characteristic of the type. In many cases, too, a foot with deficiency in stress is compensated for by another foot in the same verse showing excess of stress. Feet thus deficient in stress may conveniently be called _pyrrhics_, the pyrrhic being understood as made up of two unstressed syllables. This term has never become fully domesticated in English prosody, and some object to its use on the ground that we have no feet wholly without stress. Its use in the sense just indicated, however, seems to be an unquestionable convenience. Excess of accent, while less common than deficiency of accent, is even more easily recognizable. The foot containing two stressed syllables, even though one of the stresses may be distinctly stronger than the other, may conveniently be called a _spondee_. Inversion of accent is exceedingly familiar, especially at the beginning of the verse and after the medial pause. It consists, technically speaking, in the substitution of a trochee for an iambus or an iambus for a trochee (the latter very rarely). A light syllable inserted in dissyllabic measure is not unusual, though by no means so common as the variations previously enumerated. Such a syllable is frequently spoken of as "hypermetrical"; or, the variation may be considered as the substitution of an anapest for an iambus, in iambic measure, or the substitution of a dactyl for a trochee, in trochaic measure. The omission of one of the two light syllables from the foot in trisyllabic verse is so common as to make it difficult to find pure anapestic or dactylic verse in English. This fact is due in part to preference for dissyllabic measures, and in part to the usual indifference, in all Germanic verse, to accuracy in the number of light syllables. The variation may frequently be regarded as involving a prolongation of the light syllable of the foot, or a pause equal to the time of the omitted syllable; technically speaking, it consists in the substitution of an iambus for an anapest, or a trochee for a dactyl. Examples of all these variations may best be found in the specimens of verse included in the preceding pages. A few specimens of detail are added here, for the sake of greater clearness. _Deficiency in accent (substituted pyrrhic)._