vitiation

In the former a leaky joint may cause the vitiation of the surrounding air as the producer-gas escapes; in the suction apparatus the same fault simply causes more air to be drawn in.

From Gas-Engines and Producer-Gas Plants A Practice Treatise Setting Forth the Principles of Gas-Engines and Producer Design, the Selection and Installation of an Engine, Conditions of Perfect Operation, Producer-Gas Engines and Their Possibilities, the Care of Gas-Engines and Producer-Gas Plants, with a Chapter on Volatile Hydrocarbon and Oil Engines by R. E. Mathot

This is not a proper estimate to offer; but it will give a just idea of the rapid and fearful vitiation of the air that took place within the enclosure.

From Martyria or Andersonville Prison by Augustus C. Hamlin

Scientific men deal with facts, look to them for guidance, and must suppose that thought and fact pass into each other directly, and without vitiation or deflection.

From John Dewey's logical theory by Delton Thomas Howard

When the atmosphere is vitiated, the oxygenating processes are diminished in ratio to the vitiation.

From Martyria or Andersonville Prison by Augustus C. Hamlin

Deare madam, heare me: You had a noble husband, while he livd; And I beleive That no perswasion cold have forcd you yeild To vitiation of his honord bed, Not with a prince.

From A Collection of Old English Plays, Volume 2 by A. H. (Arthur Henry) Bullen