Stilbite is characterized by its form, difficult gelatinizing, and intumescence before the blowpipe; from natrolite as mentioned under that species.    From Wordnik.com.  [Scientific American Supplement, No. 344, August 5, 1882] Reference

For our present purpose hypertrophy may be considered as it affects the axile or the foliar organs, and also according to the way in which the increased size is manifested, as by increased thickness or swelling -- intumescence, or by augmented length-elongation, by expansion or flattening, or, lastly, by the formation of excrescences or outgrowths, which may be classed under the head of luxuriance or enation.    From Wordnik.com.  [Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants] Reference

Here, an intumescence which was to become a mountain, there, an abyss which was to be filled with an ocean or a sea.    From Wordnik.com.  [The Underground City, or, the Child of the Cavern] Reference

If in one of these points the barometer stands a few lines lower than in the other, the water will rise where it finds the least pressure of air, and this local intumescence will continue, till, from the effect of the wind, the equilibrium of the air is restored.    From Wordnik.com.  [Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1] Reference

Total and sudden transformations of a language seldom happen; conquests and migrations are now very rare: but there are other causes of change, which, though slow in their operation, and invisible in their progress, are perhaps as much superior to human resistance, as the revolutions of the sky, or intumescence of the tide.    From Wordnik.com.  [Prefaces and Prologues to Famous Books with Introductions, Notes and Illustrations] Reference

Total and sudden transformations of a language seldom happen; conquests and migrations are now very rare; but there are other causes of change, which, though slow in their operation, and invisible in their progress, are, perhaps, as much superiour to human resistance, as the revolutions of the sky, or intumescence of the tide.    From Wordnik.com.  [The Works of Samuel Johnson, Volume 05 Miscellaneous Pieces] Reference