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Books Books 1 - 3 of 3 on as well as the Kaolins, is found in commerce in the form of briquettes which are....  
" as well as the Kaolins, is found in commerce in the form of briquettes which are called pe-tun-tse." This word was for a time applied by mineralogists to a " fine, white vitrescible stone, compact and ponderous, and of considerable brightness when broken... "
Theory of the earth: with proofs and illustrations - Page 23
by James Hutton - 1899 - 278 pages
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The Natural History of the Mineral Kingdom,: Relative to the ..., Volume 1

John Williams, James Millar - Mineralogy - 1810
...informed, is composed of two different substances, called by them petuntse and kaolin. The petuntse is a fine white vitrescible stone, compact and ponderous, and of considerable brightness when broken. The kaolin is a fine white earthy substance, not vitrifiable, at least in the common heat of a potters...
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The Natural History of the Mineral Kingdom: Relative to the Strata ..., Volume 1

John Williams, James Millar - Mineralogy - 1810
...informed, is composed of two different substances, called by them petuntse and kaolin. The petuntse is a fine white vitrescible stone, compact and ponderous, and of considerable brightness when broken. The kaolin is a fine white earthy substance, not verifiable, at least in the common heat of a potter's...
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Theory of the Earth: With Proofs and Illustrations, Volume 1

James Hutton - Earth - 1899 - 278 pages
...stated that " the fusible part of the paste is furnished by a rock of a petrosiliceous nature, whii li, as well as the Kaolins, is found in commerce in the...of considerable brightness when broken " (Williams, r without, or with few distinguishable spots. They are of various thicknesses, some of them 60 or 70...
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