Duress to the individual negotiator would, however, vitiate the effect of his signature.
The Sunnites insist that the office belongs to the tribe of Koreish (Quraish) to which Mahomet himself belonged, but this condition would vitiate the claim of the Turkish sultans, who have held the office since its transference by the last caliph to Selim I.
The origin of most of the abuses which vitiate Sicilian political life, and of the frequent scandals in the representative local administrations, is to be found in the straitened condition of the Sicilian middle classes.
Though Depretis, at the end of his life in 1887, showed signs of repenting of the confusion thus created, he had established a parliamentary system destined largely to sterilize and vitiate the political life of Italy.
But turbulence in the motion will vitiate the principle that a bounding surface will always consist of the same fluid particles, as we see on the surface of turbulent water.
All-important, too, is the order of ceremonial and the formula of prayer: a mistake or omission or an unpropitious interruption may vitiate the whole ritual, and though such misfortunes may occasionally be expiated by the additional offering of a piaculum, in more serious cases the whole ceremony must be recommenced ab initio.
To restore a text from the documental evidence available we must know and weigh the causes which tend to vitiate this evidence in its various kinds.
It is therefore necessary that the solution should be free from metals which may vitiate the results, or special precautions taken by which the impurities are rendered harmless.