intumescence

The silicates of lime are moreover frequently characterized by intumescence or ebullition, when heated in the forceps in the blowpipe flame.

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

The oxide is reduced with intumescence to the metallic state, and the bead becomes clear again.

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

Perhaps his admirers may answer, that my remark is but the ramification of envy, the intumescence of ill-nature, the exacerbation of 'gloomy malignity.'

From Deformities of Samuel Johnson, Selected from his Works 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