 | | Book (edition) | | mark the degree of symmetry which belongs to each group of forms, and which is in fact the fundamental distinction...study of these different systems will show that in group 1 1. : ; : A the crystals are formed or developed...developed alike in all three axial directions; in group 2 the development is alike in the several lateral...lateral directions, but unlike vertically ; and in group 3 the crystals are formed unlike in all three These...species. In f 229, of anorthite, of the feldspar group, the form is very similar to those of the monoclinic |  | | Book | | Africa - - - - .. .. - - - - ,, F.-&rax, alum, &c. ,, G.-Barium and strontium 8alts - ,, ,...pu1--ple 1colou1", 01-iginally gave its nan1e to t}1is group of rocks, is a ho1·nblende-po1"pl1y1"ite. The ancient...were echinocler1ns belonging to tl1e Crinoiclea-a group of wl1ich there we1'e formerly but fe,v living 1"ep1...va11ation from those of Derbyshire, the adjoining county. Their geological positions are tl1e same, and...\·ariety 0£ ornamental stones yielderl by this county. 1 1'i1ARBLES OF BRlSTOL, I SLE OF MAN, &c.-Golumn |  | | Journal (volume) | | nce of Pouitifagas: Strata in n the O eCarntiit} Group of Middle Pesueyhenains ieee eae aus eee COMMON...Nevada Biped Tracks urate68; The Ploy of Chester county, Penna., 72 ; Kowalevsky on Elasmotherium, 72;...Minerals, 74; Axinite from a Annual Bethlehem, group of Minerals, 76; Heating oe. 75; for the Microscope...Dust Shower, 654; Microlite from Elba, 654; Amelia County, Va., minerals, 654; The Wm. S. Vaux Collection...Misrata ppd position vasie Archipolypdcs, a + group oi RN The COANE ME 324; 326; The Vogmar o ; Shufelde’:s |
|
