Oldal 39 [39]
MINERALOGICAL REMARKS. 289
‘Had I heard of thefe curious rocks when I was at Tokay, I fhould
certainly have arranged things fo as to have feen them more at leifure ;
but after keeping my-driver a few minutes, I was obliged to continue
my journey. A mile or two ftill further, I came to the flone quarry
from whence the light white cellular ftone, ufed at Tokay for build¬
ing, is taken. Itis what the Germans call hardened clay *, but cel¬
lular ; the cells in fome places are partly filled up with a fibrous fub¬
tance like decompofed pumice. Is this rock a decompofed porphyry
or bafalt; lava, &c.? Thefe never contain pumice, if this ftriated
matter be pumice: it is certainly not a volcanic tufa? It has a few
grains of pellucid quartz ‚mixed in it, as fome porphyries have, but
they are very few. The fhorteft and moft fathionable way would be,
to call it-boldly a decompofed Lava.
The country from Tokay to Maad is very pleafant, particularly
foon after leaving Tokay, where on one hand you have hills covered
with vines, and a fine plain varfegated with woods, and the river Bod¬
rog meandring through iton the other. In four or five hours I reached
Maad, where I took up my quarters with Baron Orcy’s fteward, and
" Argilia indurata Germanorum.
Alba fraétura inequalis, textura terrea impalpabilis, cultro facile rafilis, foraminibus
mediocribus & parvis fparfis, vacuis, aut materia dilute ochracea friabili cariofa fibrofa
repletis. ;
Tubi ferruminasorii ope, et bafıs & coneretiones yitrum album opacum prgbent
fire phofphorefcentia aut intumefcentia.
Obf. Particula pauce Quartzi pellucidi que fepe in porphyriis inveniuntur, adfunt,
fed rare.
Pp in
37