Volltext Seite (XML)
Fluor. 555 Obfervatlons. Although this very interefting foftil has been men tioned as a product of manv different countries, we know but little either of the formations which it con stitutes, or of which it forms but a part; and, except ing the geognoftic fituations which have been deter mined by Werner, and a few of his fcholars, we meet with little or nothing in mineralogical writers but a mere lift of localities. This is much'to be re gretted, particularly when we confider, that an ac quaintance with the geognoftic fituation and forma tions of individual fofiils, not only affifts us very much in afcertaining their true nature, but is highly interefting in regard to the natural hiftory of the globe. We mull not, therefore, reft fatisfied with the mere defcription, local fituation, and the ulual vague geognoftic characters of a fofiil, but muft en deavour to afcertain not only the rock formation in tvhich it occurs, but alfo its repofitory, (that is, whe ther it occurs in ftrata, beds, rock maffes, veins, or kidneys), the age of this repofitory in regard ol all Pthers, and its general and peculiar characters. EIGHTEENTH