 The preparation which they undergo is, first, exposure to the sun for some time, and then calcination. The latter process is performed by packing the stones in earthen pots, and covering them with a layer five or six inches thick of dried goat's dung....  Transactions of the Geological Society - Página 448por Geological Society of London - 1817Vista completa - Acerca de este libro
 | Thomas Thomson - 1816 - 528 páginas
...preparation which they undergo is, first, exposure to the sun for several weeks, and then calcination. The latter process is performed by packing the stones...goat's dung. Fire is then applied to the mass; and in 12 hours time the pots are sufficiently cool to be removed. The stones which they contain are now examined,... | |
 | 1816 - 528 páginas
...preparation which they undergo is, first, exposure to the suri for several weeks, and then calcination. The latter process is performed by packing the stones...them with a layer five or six inches thick of dried goat-s dung. Fire is then applied to the mass ; and in 12 hours time the pots are sufficiently cool... | |
 | Hugh Murray - 1832 - 392 páginas
...preparation which they undergo is, first, exposure to the sun for some time, and then calcination. The latter process is performed by packing the stones...thick of dried goat's dung. Fire is then applied, and in twelve hours the pots are sufficiently cool to be removed. The stones are now examined, and... | |
 | 1832 - 486 páginas
...preparation which they undergo is, first, exposure to the sun for some time, and then calcination. The latter process is performed by packing the stones...thick of dried goat's dung. Fire is then applied, and in twelve hours the pots are sufficiently cool to be removed. The stones are now examined, and... | |
 | Hugh Murray - 1833 - 398 páginas
...they undergo is, first, exposure to the sun for some time, and then calcination. The latter process ia performed by packing the stones in earthen pots, and...thick of dried goat's dung. Fire is then applied, and in twelve hours the potg are sufficiently cool to be removed. The stones are now examined, and... | |
 | Hodder Michael Westropp - 1874 - 214 páginas
...preparation which they undergo is, first, exposure to the sun for several weeks, and then calcination. The latter process is performed by packing the stones...them with a layer five or six inches thick of dried goat's-dung. Fire is then applied to the mass, and in twelve hours the pots are sufficiently cool to... | |
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