Volltext Seite (XML)
COMMON COMPACT LIMESTONE. 131 fishes, and more rarely of vegetables, as of ferns and reeds. Internally it is dull, seldom glimmering, which is ow ing to intermixed calcareous-spar. The fracture is small and fine splintery, which some times passes into large and flat conchoidal, sometimes into uneven, inclining to earthy, and it occasionally in- clines to straight and thick slaty. The fragments are indeterminate angular, more or less sharp-edged, but in the slaty variety they are tabular. It is translucent on the edges. It is semi-hard. It is brittle. It is easily frangible. Specific gravity, Splintery, 2.600, 2.720, Brisson. Opalescent Shell Marble, 2.6732, Leonhard. Ilartz Limestone, 2.4-89, Lazuis. Chemical Characters. It effervesces with acids, and the greater part is dis solved ; and burns to quicklime, without falling to pieces. Constituent Parts. ttudersdorf. I-nne, 53.00 ^arboii. acid, 12.50 Silica, u? ^■■umina, i.oO J ron * 0.75 Wat "'. 1.03 100 S,mon < Gchlen’a J our. iv. 8.426. Bluish-grey Lime Limestone {from stone* Sweden. Lime, 49.50 Lime, 49-25 Carbon, acid, 40.00 Carbon, acid, 35.00 Silica, 5.25 Sirica, 8.75 Alumina, 2.75 Alumina, 2.50 Lon, \.Z7 Iron, 2.75 Water, 1.13 1.0*9, 1.75 100 100 Simon, lb. Simon, lb. T 2 Limestone from Ettersbcrg *. Lime, 33.41 Carbon, acid, 42.00 Silica, Magnesia, Iron, Manganese, Loss, 10.25 9.43 2.25 1.25 1.41 100 Buetm’e, lb. Geognoslic * Some of the limestones in Fife.shiro agree in composition with that of ttersberg. Others, and these should have been mentioned under the ar- tlClu ^gnesian Limestone, agree with that mineral in chemical composition,
