ourselves here with adding, that the different strata which cover the terrestrial globe, being materials to be considered as actual vitrifications or analogous to glass, and possessing its most essential qualities; and as it is evident, that from the decomposition of glass and flint, which is every day made before our eyes, a genuine clay remains, it is not a precarious supposition to advance, that clays and sands have been formed by scoria, and vitrified drops of the terrestrial globe, especially when we join the proofs a priori, which we have given to evince the earth has been in a state of liquefaction caused by fire.
FOOTNOTES:
[198:A] Essay on the Natural History of the Earth, pages 40, 41, 42, &c.
[199:A] See Varennii, Geograph. General, page 46.
[205:A] See the Mem. of the Acad. 1716, page 14.
[216:A] See the Voyages of Francis Piriard, vol. 1, page 108.
[218:A] See Becher. Phys. subter.