Having vitriolized some of the meteorick stones of Aigle and Salles, near Villefranche, in the Lionese, M. Sage obtained alum from both, but in unequal proportions; the former, yielding one fourth, but the latter, not more than one eighth. Read more
To vitriolise the magnesia and alumine, which form part of the meteoric stones; I introduced into a glass retort eighteen quintals of aerolite from Salles, pulverised Read more