intumescence

In the reduction flame, upon charcoal, it is reduced to the metal with intumescence.

From A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations by Anonymous

Notice whether the substance fuses with the bead, and if so, whether there is intumescence or not.

From A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations by Anonymous

Stilbite is characterized by its form, difficult gelatinizing, and intumescence before the blowpipe; from natrolite as mentioned under that species.

From Scientific American Supplement, No. 344, August 5, 1882 by Various

In the flame of reduction, and upon charcoal, it is reduced with intumescence to metallic lead, which is volatilized by a continued blast, and sublimates on charcoal, as mentioned above.

From A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations by Anonymous

Here, an intumescence which was to become a mountain, there, an abyss which was to be filled with an ocean or a sea.

From The Underground City, or, the Child of the Cavern by Jules Verne