26q Mi n e r a p l u m b i s pa t os a
VI. Cryflallis pfeudogalsns rubro - granatins cubi-
cis transparentibus per cryllallos alias & ipfas cubicas
hyalinas gypfaceas prioribus infidentes.
VII. Aut vice verfa, cryflallis gypfaceis, infiden-
t-es fibi habentibus cryllallos pfeudogalaens nunc diftae,
utrisque cubicis, bis rubro-granatinis, illis albis.
VIII. Gypfo ponderofb, fpatofo - lamellari, niveo,
opaco, lamellis horfum vorfum per turmas tendentibus;
aut certe haematite adinftar glandulofo, glandulis he-
mifphsricis, aggregates, lamellatis, lamellis femicircula-
ribus parallelis, in centrum convergentibus, usque fere
ad peripheriam connatis; atque turn -
IX. Aut granulis pellucidis calcareo - fpatofis cry-
ftallinis, bellariorum more; aut
X. Plumbi galaena granulari nigricante opaca in-
fperfis,
XI. Zinco vitreo drufico in botrytem concreto
fufco Wallerii; denique
XII.
XII. Cryflallis plumbi fpatofi omnis generis, fobs,
aut ipfis quoque obduélis cryftallifatione ex prædi&is
aliqua. Tale aliquod fpecimen hie deferibo: Calcareo
arenaceo grifeo Wallerii infidet cum gypfo ponderofo
folido amorpho niveo opaco Bornii, folida & ipfa plumbi
galæna Linnæi, fuperficie fua extima cryftallilata, in
cryllallos tetragono - pyramidatas plerasque humiles ob-
tufiffimas, nonnullis tarnen duplo triplove altioribus, acu-
to vertice terminatis. Pyramidali huic galænæ, quanta
quanta eft, perquam denfe accumulatæ infident cryftalli
plumbi fpatofi inordinate polyedræ duplicis generis, fei-
licet pellucidæ, nitentes, excolores, vitro fimillimæ, quæ
tarnen nifi contra lucem afpiciantur a matrice avulfæ,
nigerrimæ effe videntur I hæ denfifiime undique accumulatæ
& fatis funt exiles ; turn hyalins, aquæ velut colore,
obfcuriffime albidæ, & diaphanæ dumtaxat ; atque
iflæ majufculæ, parcius hinc & inde fparfe cemuntur.
Utrasque, maximam certe partem, crufta obducit Mar-
moris metüllici drufici crifluti nivei Cronftedti, feu gy-
pfum ponderofum niveum opacum lamellare, ad fiftulam
ferruminaloriam poftquam diffiliit, & phofph.Orea refplen-
.duitluce, fufibile, absque tarnen prævia zeolitica, aut
boracina expanfione.
K k 3 LUI.